This’ll never fly, but I thought I’d give it a try.
I have no idea where I might have read the phrase I’m talking about, though one voice in my head says it was in Alice in Wonderland. But I don’t think that’s true. And anyway, I don’t remember the phrase in any detail. It consisted of four clauses:
Well ______
well ______
well ______
well ______
where each blank is filled by a past participle (I think that’s what you call it? Like as in “well met,” “well done,” etc.)
I think, but am not sure, that two of the lines were “Well asked, well answered.”
I found a single page discussing the koans of the Mu-Mon-kan that uses a construction similar to what you describe. On that page, one koan (10. Seizei Alone and Poor) concludes with “Well asked, well answered; well come, well gone.”
I have not found it elsewhere, in relation to a koan or in any other context.