# 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:** 1
**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 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/1027274/1 "2026-02-01T17:30:18Z")
Question is in the title. ---
**Author:** ![dolphinboy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dolphinboy/32/330_2.png) [@dolphinboy](https://boards.straightdope.com/u/dolphinboy)\ **Post date:** [February 1, 2026, 5:36pm 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/1027274/2 "2026-02-01T17:36:18Z")
I thought they didn’t leaven their bread because they were in a hurry to get out of Egypt… assuming it ever happened. ---
**Author:** ![Johanna](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/johanna/32/8318_2.png) [@Johanna](https://boards.straightdope.com/u/Johanna)\ **Post date:** [February 1, 2026, 5:38pm 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/1027274/3 "2026-02-01T17:38:36Z")
I think the answer is already there in the question. They were preparing to leave. ---
**Author:** ![Schnitte](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/schnitte/32/9033_2.png) [@Schnitte](https://boards.straightdope.com/u/Schnitte)\ **Post date:** [February 1, 2026, 5:39pm 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/1027274/4 "2026-02-01T17:39:46Z")
According to Exodus 12:39 it’s indeed a result of the rush with which they had to leave, but just a few verses before, in Exodus 12:19-20, there’s an explicit prohibition against leavened bread for the seven days before they left. I suppose that’s retconned. ---
**Author:** ![Johanna](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/johanna/32/8318_2.png) [@Johanna](https://boards.straightdope.com/u/Johanna)\ **Post date:** [February 1, 2026, 5:42pm 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/1027274/5 "2026-02-01T17:42:13Z")
To give them time to practice and perfect the matzoh process, I bet. ---
**Author:** ![Andy\_L](https://avatars.discourse-cdn.com/v4/letter/a/c67d28/32.png) [@Andy\_L](https://boards.straightdope.com/u/Andy_L)\ **Post date:** [February 1, 2026, 5:52pm 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/1027274/6 "2026-02-01T17:52:02Z")
Don’t leaven, just leave! ---
**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 1, 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/1027274/7 "2026-02-01T20:55:55Z")
Seven days? Yikes! Just how long did they let bread rise in those days? Or was it a case of “we could leave at any momnet”? ---
**Author:** ![kenobi\_65](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/kenobi_65/32/13178_2.png) [@kenobi\_65](https://boards.straightdope.com/u/kenobi_65)\ **Post date:** [February 1, 2026, 8:56pm 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/1027274/8 "2026-02-01T20:56:42Z")
> [@md-2000](#): > > Or was it a case of “we could leave at any momnet”? This, mostly, I suspect. ---
**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 1, 2026, 9:07pm 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/1027274/9 "2026-02-01T21:07:14Z")
Also, in the days before buying a little packet of yeast from the grocery store, you had to cultivate your own, similar to what now gets called “friendship bread”. The rising of the dough itself wouldn’t take seven days, but the culturing of the yeast might. ---
**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 1, 2026, 9:14pm 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/1027274/10 "2026-02-01T21:14:37Z")
Uh, matzo doesn’t use yeast, that’s sort of the point. 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. ---
**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 1, 2026, 9:16pm 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/1027274/11 "2026-02-01T21:16:43Z")
> [@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. ---
**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 1, 2026, 9:17pm 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/1027274/12 "2026-02-01T21:17:33Z")
Well, that’s true, but it does resolve the question of why Jews did/do so. I doubt there’s any way to tell what reason the ancient Caananites had for the prohibition. ---
**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 1, 2026, 9:22pm 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/1027274/13 "2026-02-01T21:22:55Z")
Yeah, Exodus 12 is literarily very interesting, as it segues from a narration of events into instructions for how to observe a holiday commemorating those events. The basic Jewish Sunday school teacher answer is that they didn’t have time for the bread to rise, but the Biblical text itself is contradictory on the topic. ---
**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 1, 2026, 11:28pm 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/1027274/14 "2026-02-01T23:28:15Z")
> [@Chronos](#): > > 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. Part of the Sukkot celebrations involve constructing a lean-to in your yard and brandishing a lemon along with several tree branches and waving them around outside said lean-to while you say a prayer thanking God for telling you to do those things. Why? The answer has been lost to history. Presumably the proto-Jews 3,000 years ago had a fall harvest ritual that was intended to secure a bountiful harvest and a good rainy season. That’s just the nature of a religion as old as Judaism is which has evolved and changed in so man ---
**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 1, 2026, 11:44pm 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/1027274/15 "2026-02-01T23:44:23Z")
> [@Smapti](#): > > Why? The answer has been lost to history. Maybe. Or maybe it’s not lost to history, and it does indeed commemorate a time when the Jews’ ancestors did, indeed, need to get out of town in a hurry. Just like the Bible says. Sure, some of what’s in the Bible is made up, embellished, metaphorical, or otherwise not literally true. But that doesn’t mean that all of it is. ---
**Author:** ![Sigene](https://avatars.discourse-cdn.com/v4/letter/s/df788c/32.png) [@Sigene](https://boards.straightdope.com/u/Sigene)\ **Post date:** [February 1, 2026, 11:54pm 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/1027274/16 "2026-02-01T23:54:33Z")
I was under the impression that body modifications and food practices were excellent ways to reinforce community and cultural identity. Its a way to distinguish ‘us’ from ‘them.’ > **[A Jewish Theology of Food - St Andrews Encyclopaedia of Theology](https://www.saet.ac.uk/Judaism/AJewishTheologyofFood)** ---
**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, 1:05am 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/1027274/17 "2026-02-02T01:05:12Z")
We just had a thread about this… Even if you assume there was some sort if Exodus-like event, it would have been only one of countless instances in history of people having to leave town quickly. There’s still no obvious reason why this people picked this particular ideosyncratic way of commemorating the event. ---
**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, 1:14am 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/1027274/18 "2026-02-02T01:14:29Z")
Well, building an improvised shelter in your yard certainly makes sense as a commemoration of a forced rapid evacuation. And avoiding leavening, at least, could be such a commemoration. And yes, there have been countless instances in history of people having to leave town quickly: That makes the explanation more plausible, not less. ---
**Author:** ![Marvin\_the\_Martian](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/marvin_the_martian/32/2898_2.png) [@Marvin\_the\_Martian](https://boards.straightdope.com/u/Marvin_the_Martian)\ **Post date:** [February 2, 2026, 1:23am 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/1027274/19 "2026-02-02T01:23:04Z")
Possibly an unleavened bread travels better? Takes up less volume/calorie, possibly takes longer to go stale or bad. So that seven days was preparing munchies for the road. ---
**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, 1:38am 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/1027274/20 "2026-02-02T01:38:49Z")
The three pilgrimage holidays (Passover, Shavuot, and Sukkot) almost certainly originated as agricultural festivals and acquired their association with the Exodus later on. Passover in particular was probably linked to the spring barley harvest. Perhaps unleavened bread was eaten at that time because between the labor involved in harvesting and milling the fresh grain there wasn’t time to let it rise. The book of Kings describes how during the reign of King Josiah, the priests “found” an ancient copy of “the Book of the Law”, which was probably an early version of Deuteronomy, stored away in the Temple, and that subsequently the king ordered that the Passover be celebrated for the first time since the days of the judges. If I had to guess, it was probably during the religious revival of that era that the holiday lost its agricultural focus and became tied to the Exodus story. No way of knowing for sure, but it’s certainly plausible. [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=2)