Shabbos 48a

שבת מ״ח ע״א

Shabbat 48a

Learn Shabbos 48a step by step: Aramaic beside English, every question, answer and proof colour-coded.

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Topic

שבת 48a: Heat-raising residue, רבה's two rebukes at the ריש גלותא's house, moving מוכין used for הטמנה, refilling pillows, and opening a new collar on שבת

Overview

This amud opens by finishing an answer from the previous amud. Olive residue (גפת) sends heat up to food resting on it, but sesame residue does not. Next comes a two-part story at the house of the ריש גלותא. First, רבה rebukes a servant for putting cold water on a hot kettle, because that creates new heat (אולודי), unlike stacking urns, which only keeps heat (אוקומי). Second, רבה rebukes the servant for spreading a kerchief over a water vat, because people care about keeping a kerchief dry and will squeeze it, unlike a plain cloth (פרונקא). The גמרא then returns to the משנה, and אביי rules that מוכין used for insulating stay מוקצה, since a person does not give them up just because he had no straw. A ברייתא seems to support אביי, but the גמרא shows it can be read another way. Then רב חסדא allows putting stuffing back into a pillow on שבת, and the גמרא settles a contradiction from a ברייתא: stuffing a new pillow is forbidden, but refilling an old one is allowed. Finally, רב rules that opening a new collar on שבת makes one חייב חטאת, and רב כהנא begins an objection that continues on the next amud.

Opening lines

The steps (22)

1. ResolutionOlive residue sends up heat, sesame residue does not
2. Statementרבה rebukes a servant for placing cold water on a hot kettle
3. Challengeרבי זירא asks how this differs from stacking urns
4. ResolutionKeeping heat is allowed, creating heat is not
5. Statementרבה rebukes the servant for putting a cup on a kerchief over a vat
6. Questionרבי זירא asks why
7. ResponseWatch and see: the servant squeezes the kerchief
8. ChallengeHow is this different from a plain cloth?
9. ResolutionPeople care about a kerchief, not about a plain cloth
10. StatementQuoting the משנה: not in straw
11. QuestionMay insulating scraps be moved on שבת?
12. Responseאביי Rules the Stuffing Stays Set Aside
13. ProofA ברייתא Seems to Support אביי
14. RejectionThe ברייתא Means Unused Materials
15. ChallengeWhy Would the ברייתא State Something Obvious
16. ResolutionOne Might Think They Are Fit to Sit On
17. Statementרב חסדא allows putting stuffing back into a pillow on שבת
18. Challengeרב חנן בר חסדא challenges רב חסדא from a ברייתא
19. ResolutionNew pillows versus old pillows
20. ProofA ברייתא supports the new-versus-old split
21. StatementOpening a new collar on שבת makes one liable for a חטאת
22. Challengeרב כהנא opens a strong objection to רב