Gittin 67B

ואיכא דאפיך להו.

And there are those who reverse the attribution of the opinions of Rabba and Rav Yosef with regard to this matter.

אמר לעשרה: ״כתבו גט״. תנו רבנן, אמר לעשרה: ״כתבו גט, ותנו לאשתי״⁠ – אחד כותב על ידי כולם. ״כולכם כתובו״⁠ – אחד כותב במעמד כולם. ״הוליכו גט לאשתי״⁠ – אחד מוליך על ידי כולם. ״כולכם הוליכו״⁠ – אחד מוליך במעמד כולם.

The Mishnah teaches that if a man said to 10 people: Write and give a bill of divorce to my wife, one of the 10 writes the bill of divorce and two sign it. A baraita states: If one said to 10 people: Write a bill of divorce and give it to my wife, one writes on behalf of them all. If he said: All of you write the document, one writes it in the presence of them all. If he said: Deliver a bill of divorce to my wife, one person brings it on behalf of them all. If he said: All of you deliver a bill of divorce, then one brings it in the presence of them all.

איבעיא להו: מנה אותן, מהו? רב הונא אמר: מנה אינו כ״כולכם״, רבי יוחנן משום רבי אלעזר דמן רומה אמר: מנה הרי הוא כ״כולכם״.

A dilemma was raised before the rabbis: If he said: Write a bill of divorce, and he enumerated them by name, what is the halakha? Can one of them write the bill of divorce on behalf of them all? Or perhaps it is comparable to a situation where one says: All of you write, when it must be written in the presence of them all. Rav Huna says: If one enumerated them by name, it is not comparable to saying: All of you write. R' Yoḥanan says in the name of R' Elazar of Rome: If one enumerated them by name, it is comparable to saying: All of you write.