Ketubot 97A

אם במתנה נוטלן לא כך יפה כחו.

If he takes it as a gift, his power as a creditor is not enhanced in this manner. He is not served well because he would not be able to seize property sold to a third party in order to receive his gift. So too, the widow can sell property and then decide later for what purpose she sold it.

כיצד מוכרת? אמר רבי דניאל בר רב קטינא אמר רב הונא: מוכרת אחת לשנים עשר חדש, ולוקח מפרנס אחת לשלשים יום. ורב יהודה אמר: מוכרת לששה חדשים, ולוקח מפרנס אחת לשלשים יום.

§ The Talmud asks: How does a widow sell property to earn money for her support? R' Daniel bar Rav Ketina said that Rav Huna said: She sells her late husband’s property once every 12 months and the buyer who purchased the property from her provides her with money once every 30 days. And Rav Yehuda said: She sells once every 6 months and the buyer provides her with money once every 30 days.

תניא כוותיה דרב הונא: מוכרת לשנים עשר חדש, ולוקח מפרנס אחת לשלשים יום. תניא כוותיה דרב יהודה: מוכרת לששה חדשים, ולוקח מפרנס אחת לשלשים יום.

The Talmud notes: It is taught in a baraita in accordance with the opinion of Rav Huna: She sells once every 12 months, and the buyer provides her with support once every 30 days. So too, it is taught in a baraita in accordance with the opinion of Rav Yehuda: She sells once every 6 months, and the buyer provides her with money once every 30 days.

אמר אמימר, הלכתא: מוכרת לששה חדשים ולוקח מפרנס אחת לשלשים יום. אמר ליה רב אשי לאמימר: דרב הונא מאי? אמר ליה: לא שמיע לי, כלומר: לא סבירא לי.

Ameimar said: The halakha is that she sells once every 6 months and the buyer provides her with money once every 30 days, in accordance with the opinion of Rav Yehuda. Rav Ashi said to Ameimar: What do you have to say about the opinion of Rav Huna? He said to him: I did not hear about this statement; that is to say, I do not hold in accordance with it.