ורב ענן ברייתא לא שמיעא ליה, ודשמואל ממאי דאינה מכורה ומעות חוזרין? דלמא אינה מכורה ומעות מתנה, מידי דהוה אמקדש אחותו, דאיתמר: המקדש אחותו — רב אמר: מעות חוזרין, ושמואל אמר: מעות מתנה.
The Talmud explains: And Rav Anan did not resolve his dilemma from the baraita, as he did not learn this baraita. And he could not resolve it from the statement of Shmuel itself, that the sale of a field during the Jubilee Year is ineffective, as the meaning of Shmuel’s statement is unclear. From where can one infer that Shmuel means that the field is not sold and the money is returned? Perhaps he means that the field is not sold and the money is considered a gift, just as it is considered a gift in his opinion in the case of one who betroths his sister. As it was stated: With regard to one who betroths his sister, a betrothal that is invalid, Rav says that the money with which the brother betrothed his sister is returned, as he knew that the betrothal was invalid and merely intended to deposit the money with her for safekeeping. And Shmuel says that it is assumed that he wished to give her the money as a gift.