Eruvin 85b

עירובין פ״ה ע״ב

Learn Eruvin 85b step by step: Aramaic beside English, every question, answer and proof colour-coded.

Open Eruvin 85b in Gemara Clarity

Topic

Using the air between domains, and where an עירוב or שיתוף may be placed (gatehouses, sheds, courtyards), with רבי יהודה's rule on the owner's right of usage.

Overview

The amud opens with the end of רב's ruling about two houses with three ruins between them. Each house may use the ruin next to it, but the middle ruin is forbidden to both. רב explains that the ruins stand in a triangle, so each side ruin can be reached by the far house only through the air, and the air does not forbid. The גמרא then defends שמואל, who holds that the air does forbid: that fence applies only to domains that are rabbinic. It also defends רב's ban on throwing between two houses across רשות הרבים: the concern is that the object may fall into the street, not the air. A new משנה teaches that an עירוב placed in a gatehouse, portico or balcony is invalid, and a resident there does not forbid. In storage sheds an עירוב is valid and a resident does forbid, unless, says רבי יהודה, the owner keeps a right of usage there. The גמרא works out where an עירוב and a שיתוף may be kept: an עירוב goes in a house, and a שיתוף goes in a courtyard. It applies this to a group whose meal ran into שבת. Finally, it gives the courtyard of בוניס as an example of a right of usage and begins a story about his son visiting רבי, which continues on the next amud.

Opening lines

The steps (30)

1. StatementThe middle ruin is forbidden
2. QuestionA student doubts the ruling is really from רב
3. Responseרב himself confirms the ruling
4. ChallengeChallenge from רב's ruling on lowering and throwing
5. ResolutionThe ruins stand in a triangle, not a line
6. ChallengeDoes שמואל disagree with רב דימי's report?
7. ResolutionTorah domains versus rabbinic domains
8. Challengeרב forbids throwing between two houses
9. ResolutionOne house is higher than the other
10. StatementGatehouse, portico and balcony: not a valid place for an עירוב
11. StatementStorage sheds: a valid place for an עירוב, and a resident there forbids
12. Statementרבי יהודה: if the homeowner keeps usage rights, the resident does not forbid
13. Statementרב יהודה's two general rules, each with an exception
14. ChallengeWhat does רב יהודה add? The משנה already teaches it
15. ResolutionThe rule was needed for the two cases the משנה did not teach
16. ProofA ברייתא that seems to support this
17. ChallengeBut the משנה says this is not an עירוב
18. ResolutionRead it as a valid שיתוף
19. ChallengeA שיתוף in the open alleyway is not guarded
20. ResolutionRead it as a courtyard within the alleyway
21. StatementA dining group may rely on the bread on the table as an עירוב
22. StatementAnother version: the bread counts as a שיתוף
23. Resolutionרבה: the two versions do not argue
24. Proofאביי brings a source that supports רבה
25. ChallengeThe ברייתא clashes with the משנה
26. ResolutionThe ברייתא is reread: house in the courtyard, courtyard in the alleyway
27. QuestionWhat counts as a right of usage?
28. ResponseAn example: the courtyard of בוניס
29. Statementרבי honors the son of בוניס
30. StatementAnother visitor arrives