Shabbos 91a

שבת צ״א ע״א

Shabbat 91a

Learn Shabbos 91a step by step: Aramaic beside English, every question, answer and proof colour-coded.

Open Shabbos 91a in Gemara Clarity

Topic

How a person's intention (מחשבה) shapes liability for הוצאה on שבת: storing an item for its use, the minimum amount for seeds, whether one person's storing can obligate someone else, and changing one's mind mid-act.

Overview

This amud continues the גמרא on the משנה about someone who stored a small item and later carried it out on שבת. First the גמרא explains that he is liable because a person acts on his original plan. Then רב יהודה in the name of שמואל says רבי מאיר makes a person liable even for one wheat kernel carried out for planting. רב יצחק בריה דרב יהודה challenges this with the case of someone who plans to carry out his whole house, and the גמרא answers that a strange plan nobody else shares is ignored. The גמרא then notes that the משנה's rule, that anyone else needs the normal measure, disagrees with רבי שמעון בן אלעזר, who holds that one person's storing can make another person liable. רבא in the name of רב נחמן rules that switching between eating and planting while carrying does not cancel liability. רבא then builds a ladder of questions about seeds that swelled or shrank along the way, and all of them end in תיקו. Finally רבא asks רב נחמן whether an olive-size of תרומה that completes an egg-size of impure food counts for שבת. רב נחמן begins answering from אבא שאול's ruling on the Temple breads, and the argument finishes on the next amud.

Opening lines

The steps (22)

1. ResolutionA person acts on his original plan
2. StatementEven one wheat kernel makes one liable
3. ChallengeIsn't that obvious from the משנה?
4. Resolution'Any amount' could have meant an olive-size
5. ChallengeWhat about planning to carry out his whole house?
6. ResolutionAn unusual plan is ignored
7. StatementQuoting the משנה: others need the normal measure
8. StatementThe משנה disagrees with רבי שמעון בן אלעזר
9. Proofרבי שמעון בן אלעזר: one person's storing obligates another
10. StatementChanging one's mind between eating and planting
11. ChallengeIsn't that obvious, since either way there is a measure?
12. ResolutionLifting and placing need not share one intention
13. QuestionHalf a fig-size for planting that swelled, then switched to eating
14. QuestionA fig-size for eating that shrank, then switched to planting
15. QuestionFood that shrank and then swelled back
16. ConclusionThe questions stay unresolved
17. QuestionThrowing an olive-size of תרומה into an impure house
18. ChallengeAn olive-size seems too small for either issue
19. ResolutionIt is about שבת, and the olive completes an egg-size
20. QuestionDoes counting for impurity make it count for שבת?
21. Responseרב נחמן cites אבא שאול on the Temple breads
22. ProofWhy the ברייתא proves the point