Gemara Clarity

Shabbos 100a

שבת ק׳ ע״א

Shabbat 100a

Learn Shabbos 100a step by step: Aramaic beside English, every question, answer and proof colour-coded.

Open Shabbos 100a in Gemara Clarity

Topic

Throwing on שבת: when an object counts as resting (on water, a wall, a hole, or after rolling) and what creates or cancels a רשות היחיד (pits, holes, mounds)

Overview

The amud opens by finishing a point: an object floating on water is not considered 'resting' (הנחה). רבא asks about a nut resting in a floating vessel, and the question stays unresolved (תיקו). The גמרא notes that oil floating on wine is already a מחלוקת between רבי יוחנן בן נורי and the רבנן. אביי then rules on pits in the רשות הרבים: a thrown mat that divides a pit cancels its walls, and water filling a pit does not cancel them but fruit does. A ברייתא of רבי שמעון about throwing into the sea supports him. A new משנה teaches that an object hitting a wall below ten טפחים counts as landing, and רבי יוחנן explains that this means a sticky fig-cake. Related teachings cover an object landing in a small hole (the מחלוקת about חוקקין להשלים) and a gradual mound that counts as a wall. A second משנה deals with thrown objects that roll after landing, and רבי יוחנן and a ברייתא require that the object actually rested for a moment. רבא adds that for the רבנן even an object within three טפחים of the ground must truly rest, and רבינא begins to question מרימר about this. His question continues on the next amud.

Opening lines

לָאו הַיְינוּ הַנָּחָתָן.

that is not considered their placement.

בָּעֵי רָבָא:

Rava asked:

אֱגוֹז בִּכְלִי

a nut in a vessel

וּכְלִי צָף עַל גַּבֵּי מַיִם — מַהוּ?

and the vessel floats on water, what is the law?

The steps (25)

  1. ConclusionFloating on water is not resting
  2. Questionרבא's question: a nut in a floating vessel
  3. ConclusionThe question stays unresolved
  4. StatementOil on wine is a known dispute
  5. ProofThe source: a טבול יום touching oil on wine
  6. Statementאביי: a pit eight wide and a mat
  7. StatementFor אביי, dirt surely cancels the walls
  8. StatementFor רבי יוחנן, a mat surely does not
  9. Statementאביי: a pit full of water vs. full of fruit
  10. QuestionWhy the difference?
  11. ResponseWater does not cancel the walls; fruit does
  12. Proofברייתא support: throwing into the sea
  13. StatementThrowing at a wall above or below ten handbreadths
  14. ChallengeBut the object did not come to rest
  15. ResolutionThe case is a sticky fig-cake
  16. StatementLanding in a tiny hole above ten depends on a dispute
  17. ProofA ברייתא confirms the dispute about the hole
  18. StatementA gradual mound counts as a wall
  19. ProofA ברייתא about a sloped alleyway supports רב
  20. StatementA thrown object that rolls into or out of ארבע אמות
  21. ChallengeBut the object never came to rest
  22. ResolutionIt briefly rested on something
  23. ProofA ברייתא about wind supports רבי יוחנן
  24. StatementWithin three טפחים, the רבנן still require real resting
  25. Questionרבינא is about to respond to מרימר