# What was the point of ordering the Israelites to not leaven their bread as they prepared to depart Egypt? **URL:** \ **Category:** Factual Questions\ **Created:** [February 1, 2026, 5:30pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274 "2026-02-01T17:30:18Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![Exapno\_Mapcase](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/exapno_mapcase/32/1051_2.png) [@Exapno\_Mapcase](https://boards.straightdope.com/u/Exapno_Mapcase)\ **Post date:** [February 2, 2026, 1:40am UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/21 "2026-02-02T01:40:36Z")
That comment would work better if there were even a Planck’s volume (4.222\*10-105 cubic meters) of evidence for Jewish slaves being forced to leave Egypt at any workable time within hundreds of years of the supposed Exodus. The many stories about a people needing to flee are evidence that the plotline makes for a good story, and not that any individual story is true. Some of them certainly have historic roots, but, as I’ve argued elsewhere, all fiction has roots in human experience. You cannot argue the opposite, that an appearance in fiction implies a particular reality. ---
**Author:** ![Thing.Fish](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/thing.fish/32/9168_2.png) [@Thing.Fish](https://boards.straightdope.com/u/Thing.Fish)\ **Post date:** [February 2, 2026, 1:56am UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/22 "2026-02-02T01:56:34Z")
Building shelters in your yard is explicitly commanded as a commemoration of the miracles which sustained the Jews for forty years in the desert, not of the Exodus itself. ---
**Author:** ![Princhester](https://avatars.discourse-cdn.com/v4/letter/p/3e96dc/32.png) [@Princhester](https://boards.straightdope.com/u/Princhester)\ **Post date:** [February 2, 2026, 2:05am UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/23 "2026-02-02T02:05:27Z")
> [@Thing.Fish](#): > > There’s still no obvious reason why this people picked this particular ideosyncratic way of commemorating the event. The scene in “Life of Brian” in which Brian’s followers seize on his dropped shoe as some sort of sign to which they insist on assigning meaning and following assiduously may be comedy, but it is satire ie it speaks to an actual, rather ridiculous, human trait. ---
**Author:** ![Smapti](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/smapti/32/17938_2.png) [@Smapti](https://boards.straightdope.com/u/Smapti)\ **Post date:** [February 2, 2026, 2:35am UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/24 "2026-02-02T02:35:21Z")
In the Talmud, there are quite a few instances where the discussion of how or why a certain mitzvot is performed the way it is essentially boils down to “We have no idea why we do this, but God told us to do it that way, so that’s what we’re gonna do”. ---
**Author:** ![Chronos](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chronos/32/134_2.png) [@Chronos](https://boards.straightdope.com/u/Chronos)\ **Post date:** [February 2, 2026, 3:24am UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/25 "2026-02-02T03:24:20Z")
> [@Exapno\_Mapcase](#): > > That comment would work better if there were even a Planck’s volume (4.222\*10-105 cubic meters) of evidence for Jewish slaves being forced to leave Egypt at any workable time within hundreds of years of the supposed Exodus. There is. There’s a written account. Which isn’t the strongest evidence out there, but it’s more than a Planck volume, and a lot more evidence than we have of most things that happened thousands of years ago. But you’re also adding unnecessary details. I just said that it made sense as a commemoration of a people needing to leave somewhere in a hurry. That remains true if the somewhere was Egypt or someplace else, and regardless of their status at the time of the leaving. ---
**Author:** ![Exapno\_Mapcase](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/exapno_mapcase/32/1051_2.png) [@Exapno\_Mapcase](https://boards.straightdope.com/u/Exapno_Mapcase)\ **Post date:** [February 2, 2026, 3:31am UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/26 "2026-02-02T03:31:19Z")
> [@Chronos](#): > > I just said that it made sense as a commemoration of a people needing to leave somewhere in a hurry. Yes, it probably is. But that’s nearly meaningless as any sort of an analysis. The small-e account of an exodus must mean _something_. That its meaning is of a small-e exodus is merely tautological. Why bother with such a statement unless, as is true of almost all biblical exegeses, the intent is to convince readers that the account has a more specific history and connotation than the patent fiction it is? ---
**Author:** ![puzzlegal](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/puzzlegal/32/3827_2.png) [@puzzlegal](https://boards.straightdope.com/u/puzzlegal)\ **Post date:** [February 2, 2026, 5:35am UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/27 "2026-02-02T05:35:11Z")
> [@Chronos](#): > > > [@Thing.Fish](#): > > > > The “real” reason is likely that the pagans who would eventually become Jews had some spring harvest festival where only unleavened bread was eaten, and the Exodus story later got grafted onto that much like Jesus’ birthday got grafted onto Saturnalia. > > No, that doesn’t explain anything at all, because then you’re just pushing the question back to why the pre-Jews ate unleavened bread. I’ve read speculation that it was a celebration of the barley harvest. And most of that barley was destined to become beer. (And back then, the distinction between beer and bread was much muddier.) So it makes emotional sense to avoid yeast at that delicate time when the barley is being gathered in. ---
**Author:** ![Mangetout](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mangetout/32/19_2.png) [@Mangetout](https://boards.straightdope.com/u/Mangetout)\ **Post date:** [February 2, 2026, 8:52am UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/28 "2026-02-02T08:52:17Z")
Speculation: It may have something to do with the ‘Hungry Gap’ - a real-world phenomenon occurring when agricultural communities start to reach the end of their winter stores, but the current year’s crops are not ready to harvest yet. Much of the austerity theme in the Christian observance of Lent coincides with the Hungry Gap and is very likely related to it. Of course Passover pre-dates Lent (and some aspects of Lent are likely borrowed from Passover), but the Hungry Gap precedes all of those things because it’s a phenomenon driven by natural seasons. More speculation: leavened bread requires specific kinds of grain (wheat, barley, rye, emmer etc); unleavened bread can be made from a broader range of things including the above, but also millet, sorghum, sesame, chickpea, teff, lentils etc - so it’s more likely that the dregs of your winter stores would be suited to making unleavened bread than leavened. ---
**Author:** ![kaylasdad99](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/kaylasdad99/32/3398_2.png) [@kaylasdad99](https://boards.straightdope.com/u/kaylasdad99)\ **Post date:** [February 2, 2026, 12:59pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/29 "2026-02-02T12:59:39Z")
I was just thinking “baking powder is a thing.” ---
**Author:** ![puzzlegal](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/puzzlegal/32/3827_2.png) [@puzzlegal](https://boards.straightdope.com/u/puzzlegal)\ **Post date:** [February 2, 2026, 1:41pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/30 "2026-02-02T13:41:31Z")
Baking powder is a new thing. It’s only been used for a couple hundred years. And for whatever reason, the rabbis decided it didn’t count. Baking powder is widely used in kosher-for-passover items. ---
**Author:** ![Pleonast](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/pleonast/32/1183_2.png) [@Pleonast](https://boards.straightdope.com/u/Pleonast)\ **Post date:** [February 2, 2026, 4:14pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/31 "2026-02-02T16:14:13Z")
> [@Exapno\_Mapcase](#): > > > [@Chronos](#): > > > > I just said that it made sense as a commemoration of a people needing to leave somewhere in a hurry. > > Yes, it probably is. But that’s nearly meaningless as any sort of an analysis. The small-e account of an exodus must mean _something_. That its meaning is of a small-e exodus is merely tautological. Why bother with such a statement unless, as is true of almost all biblical exegeses, the intent is to convince readers that the account has a more specific history and connotation than the patent fiction it is? I think you’ve got the cart before the horse. Fact: living Jewish people commemorate an exodus with (among other things) unleavened bread. That is the starting point for any sociological description of the culture. The next step is asking the living participants why. And they mostly say “because we are preparing to leave”. You seem to be focused on the analysis of historical accounts. Instead of trying to understand the unleavened bread in terms of those accounts, it’s better to understand the Biblical and oral accounts in terms of the cultural phenomena we currently observe. ---
**Author:** ![Exapno\_Mapcase](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/exapno_mapcase/32/1051_2.png) [@Exapno\_Mapcase](https://boards.straightdope.com/u/Exapno_Mapcase)\ **Post date:** [February 2, 2026, 4:20pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/32 "2026-02-02T16:20:32Z")
Certainly an interesting and worthy course of study for academics, but wholly distinct from trying to tease out origins, which seems to obsess the vast majority of people. ---
**Author:** ![Pleonast](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/pleonast/32/1183_2.png) [@Pleonast](https://boards.straightdope.com/u/Pleonast)\ **Post date:** [February 2, 2026, 4:33pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/33 "2026-02-02T16:33:16Z")
But this question isn’t about origins. It doesn’t matter how reliable the Biblical account is. It’s about “what was the point”. And vast majority of Jewish practitioners will tell us the answer: to prepare to leave. ---
**Author:** ![gnoitall](https://avatars.discourse-cdn.com/v4/letter/g/bb73d2/32.png) [@gnoitall](https://boards.straightdope.com/u/gnoitall)\ **Post date:** [February 2, 2026, 4:34pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/34 "2026-02-02T16:34:28Z")
It seems to me that, as an FQ, this isn’t an encouraging topic. AFAICT, there are two sources: the narrative in religious scripture, and yank-it-out-of-your-ass speculation. I personally would welcome a little bit of the missing third source type: well-researched information based on non-scriptural source material, such as documented contemporaneous history. ---
**Author:** ![Thing.Fish](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/thing.fish/32/9168_2.png) [@Thing.Fish](https://boards.straightdope.com/u/Thing.Fish)\ **Post date:** [February 2, 2026, 5:01pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/35 "2026-02-02T17:01:14Z")
The problem is that this custom dates from prehistory, so by definition we have no primary source material available. It’s unlikely we’ll ever know more than we do now. ---
**Author:** ![md-2000](https://avatars.discourse-cdn.com/v4/letter/m/9d8465/32.png) [@md-2000](https://boards.straightdope.com/u/md-2000)\ **Post date:** [February 2, 2026, 5:28pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/36 "2026-02-02T17:28:15Z")
> [@Mangetout](#): > > Speculation: It may have something to do with the ‘Hungry Gap’ - a real-world phenomenon occurring when agricultural communities start to reach the end of their winter stores, but the current year’s crops are not ready to harvest yet. > > Much of the austerity theme in the Christian observance of Lent coincides with the Hungry Gap and is very likely related to it. Of course Passover pre-dates Lent (and some aspects of Lent are likely borrowed from Passover), but the Hungry Gap precedes all of those things because it’s a phenomenon driven by natural seasons. > > More speculation: leavened bread requires specific kinds of grain (wheat, barley, rye, emmer etc); unleavened bread can be made from a broader range of things including the above, but also millet, sorghum, sesame, chickpea, teff, lentils etc - so it’s more likely that the dregs of your winter stores would be suited to making unleavened bread than leavened. My thought too, would it relate to the concept of a harvest festival where they got the first bits of harvest and are in a hurry to eat? “Oy, vey! Skip the waiting to rise the bread, let’s eat and dance! But not men and women together!” What were the harvest cycles in Egypt and the Levant those days? The Nile would flood between June and September, meaning - I assume - planting in October? ---
**Author:** ![MrDibble](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mrdibble/32/114_2.png) [@MrDibble](https://boards.straightdope.com/u/MrDibble)\ **Post date:** [February 2, 2026, 7:51pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/37 "2026-02-02T19:51:38Z")
There seems to be some underlying notion here that risen breads were the norm and having unleavened bread would have been unusual. When actually the Levant is lousy with many kinds of unleavened breads and they would have been the norm with fully risen loaves as more special, anyway. So the people who crafted these stories in the Exile did so using the common bread type that was all around them anyway, the kind that they’d make with the facilities and rations allocated to them - check out the al-Yahudu tablets and Babylonian ration tablets in general. ---
**Author:** ![Spiderman](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/spiderman/32/230_2.png) [@Spiderman](https://boards.straightdope.com/u/Spiderman)\ **Post date:** [February 2, 2026, 8:55pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/38 "2026-02-02T20:55:37Z")
> [@Pleonast](#): > > It doesn’t matter how reliable the Biblical account is. It’s about “what was the point”. And vast majority of Jewish practitioners will tell us the answer: to prepare to leave. … **quickly**. The Pharaoh was allowing them to leave. They felt they needed to skedaddle before he changed his mind (again). You don’t finish baking prep (allowing it to rise); you don’t finish baking, you GTFO. If you’re notified of an emergency whether it’s a wildfire, tornado, or a meltdown of the nuke plant upwind of you are you going to finish cooking that slow-roasting stew or are you just going to turn off the oven & get dinner on the road later somewhere where you’re not going to die by taking your time? ---
**Author:** ![DrDeth](https://avatars.discourse-cdn.com/v4/letter/d/b487fb/32.png) [@DrDeth](https://boards.straightdope.com/u/DrDeth)\ **Post date:** [February 2, 2026, 9:33pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/39 "2026-02-02T21:33:12Z")
> [@Marvin\_the\_Martian](#): > > Possibly an unleavened bread travels better? Takes up less volume/calorie, possibly takes longer to go stale or bad. Correct, in fact it can be a sort of hardtack. ---
**Author:** ![Princhester](https://avatars.discourse-cdn.com/v4/letter/p/3e96dc/32.png) [@Princhester](https://boards.straightdope.com/u/Princhester)\ **Post date:** [February 2, 2026, 11:56pm UTC](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274/40 "2026-02-02T23:56:21Z")
I disagree. You seem to be trying to change the OP’s question to "what _[is now seen as]_ the point of ordering the Israelites to not leaven their bread as they prepared to depart Egypt _[in modern Jewish mythology]_? The actual OP’s question is "What **was** the point of ordering the Israelites to not leaven their bread as they prepared to depart Egypt? It seems to me to be asking about the original point at the time. Not what that point is now mythologised to be. [Previous page](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274.md?page=1) [Next page](https://boards.straightdope.com/t/what-was-the-point-of-ordering-the-israelites-to-not-leaven-their-bread-as-they-prepared-to-depart-egypt/1027274.md?page=3)