Eruvin 81A

גמ׳ תנינא חדא זימנא: בכל מערבין ומשתתפין, חוץ מן המים והמלח!

Talmud: With regard to the Mishnah’s ruling concerning the foods which may or may not be used for an eiruv and to merge alleyways, the Talmud poses a question: This ruling is apparently superfluous, as we have already learned it once before in another Mishnah: One may establish an eiruv and a merging of alleyways with all kinds of food, except for water and salt.

אמר רבה: לאפוקי מדרבי יהושע, דאמר: ככר ⁠— אין, מידי אחרינא ⁠— לא, קמשמע לן ״בכל״.

Rabba said: This addition comes to exclude the opinion of R' Yehoshua in the Mishnah, who said that a loaf, yes, it may be used for an eiruv; but anything else, no, other foods may not be used. Therefore, the Mishnah teaches us that an eiruv may be established with all kinds of food, not only bread.

איתיביה אביי: בכל מערבין עירובי חצירות ובכל משתתפין שיתופי מבואות, ולא אמרו לערב בפת אלא בחצר בלבד. מאן שמעת ליה דאמר פת ⁠— אין, מידי אחרינא ⁠— לא, רבי יהושע, וקתני ״בכל״!

Abaye raised an objection from a baraita: One may establish a joining of courtyards with all kinds of food, and likewise one may establish a merging of alleyways with all kinds of food. They said that one must establish an eiruv with bread only with regard to an eiruv of a courtyard. Who did you hear that said that bread, yes, it may be used for an eiruv, but anything else, no, it may not be used? It was R' Yehoshua, and yet the baraita teaches: With all kinds of food. This proves that the phrase: One may establish an eiruv with all kinds of food, does not necessarily exclude R' Yehoshua’s opinion.

אלא אמר רבה בר בר חנה: לאפוקי מדרבי יהושע, דאמר שלימה ⁠— אין, פרוסה ⁠— לא, קמשמע לן ״בכל״.

Rather, Rabba bar bar Ḥana said: It comes to exclude a different aspect of the opinion of R' Yehoshua, as R' Yehoshua said: A whole loaf, yes, it is fit to be used as an eiruv, but a broken loaf, no, it is not suitable for this purpose. The Mishnah therefore teaches us that one may prepare an eiruv with all kinds of bread, even a broken loaf.