Kereisos 13a

כריתות י״ג ע״א

Keritot 13a

Learn Kereisos 13a step by step: Aramaic beside English, every question, answer and proof colour-coded.

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Topic

Combining separate eatings within כדי אכילת פרס: רבי מאיר and חכמים, the refutation of רבנאי, and the rules of impure food, immersion, a pregnant woman and a nursing baby

Overview

The גמרא first proves from the exact wording of חכמים in the משנה ('עד שישהא') that רבי מאיר's ruling is a stringency. Next, רבנאי quotes שמואל: for חלבים and נבילה, the whole כזית must be eaten within כדי אכילת פרס. For impure foods and liquids, the eating counts even over a whole day. רב פפא explains this to mean that each כזית must be eaten within כדי אכילת פרס. A ברייתא then says that separate eatings of impure food or drink combine only if the time from the first bite to the last fits within כדי אכילת פרס, and רבנאי is refuted. The גמרא goes on to explain other lines of that ברייתא. Immersing in the middle of eating is forbidden, so a person won't rely on an immersion that doesn't count. A pregnant woman may eat in small portions, even a lot in total, because of danger. The ברייתא also says the baby of an impure nursing mother stays pure. רב נחמן's explanation for this is rejected by רבא, who says the baby is pure because of a double doubt about the amount he drank and the time it took. Finally, the גמרא challenges רבא's view that a woman's milk is like a spring and needs no הכשר, and begins quoting a ברייתא about a זב's liquids that continues on the next amud.

Opening lines

The steps (27)

1. ProofThe wording of חכמים fits if רבי מאיר is being strict
2. ChallengeIf רבי מאיר were lenient, חכמים should have used different words
3. ConclusionConclusion: רבי מאיר is being strict
4. Statementשמואל's rules for forbidden foods and for impure foods
5. QuestionWhat does שמואל mean?
6. Responseרב פפא: the whole day, as long as each כזית is within the time limit
7. ChallengeA ברייתא seems to require the whole half-פרס within the time limit
8. ResolutionThe ברייתא means each כזית within the time limit
9. ChallengeA second ברייתא says start to finish must fit in the time limit
10. StatementThe ברייתא continues: immersing in the middle and a pregnant woman
11. StatementThe ברייתא gives the same time limit for liquids
12. StatementA nursing mother who touched a corpse-impure person may nurse her baby
13. ConclusionThe ברייתא conclusively refutes רבנאי
14. QuestionWhat does 'they did not permit him to immerse' mean?
15. Responseרב יהודה: the rule stops a person from relying on an immersion that does not count
16. ChallengeWhy only less than the measure if there is danger?
17. Resolutionרב פפא: small portions, even if the total is a lot
18. ChallengeWhy does the nursing baby stay pure?
19. ChallengeBlocking the answer that the milk was never made susceptible
20. ResolutionOne strong suck leaves no drop
21. Rejectionרבא: two problems with the one-suck answer
22. ProofA משנה about a woman's milk
23. ProofUnwanted milk still counts
24. Resolutionרבא's own reason: a double doubt
25. ChallengeQuestioning רבא's view of the milk's source
26. ChallengeMilk dripping into an oven shows that a woman's milk needs הכשר
27. Challengeרבא cannot simply disagree with רבי יוחנן, because a ברייתא lists the liquids of a זב