Ketubot 103A

מאי למקום שאמה? שמעת מינה בת אצל האם, לא שנא גדולה ולא שנא קטנה.

What is the purpose of emphasizing: To the place where her mother lives? Conclude from here that a daughter lives with her mother; it is no different if she is an adult woman, and it is no different if she is a minor girl.

לא יאמרו שניהם וכו׳.

§ It was taught in the Mishnah that if two men are obligated to support this girl, both of them may not jointly say that they will be partners in her support. Rather, each one fulfills his obligation independently.

ההוא גברא דאוגר ליה ריחיא לחבריה לטחינה. לסוף איעתר, זבין ריחיא וחמרא,

The Talmud relates that there was a certain man who rented out a millstone to another for the price of grinding, i.e., the one who rented the millstone was to pay the cost of the rental by grinding whatever the owner needed to be ground. In the end, the owner of the millstone became rich, and he purchased another millstone and a donkey, and he no longer required the services of the renter to grind things for him.

אמר ליה: עד האידנא הוה טחיננא גבך, השתא הב לי אגרא. אמר ליה: מיטחן טחיננא לך.

The owner of the millstone said to the renter: Until now I would have what I needed ground by you, and the service that you provided was in place of payment for the rental of the millstone. Now, since I no longer require this service, give me payment for the millstone. The renter said back to him: I will grind for you because that is what I agreed to, but I did not agree to have to pay money.

סבר רבינא למימר: היינו מתניתין לא יאמרו שניהם ״הרי אנו זנין אותה כאחד״, אלא אחד זנה ואחד נותן לה דמי מזונות.

Ravina thought to say that this is the same as the Mishnah that states that both of them may not jointly say: We will sustain the girl as one in a partnership. Rather, one sustains her, providing her with food, while the other gives her the monetary value of the sustenance. In that case, although the original condition was to provide the girl with support in the form of food, when circumstances changed, the previous husband became obligated to pay her support in the form of money. So too here, due to the change in circumstances, the renter should pay the owner of the millstone with money.