Kiddushin 32A

משל מי? רב יהודה אמר: משל בן. רב נתן בר אושעיא אמר: משל אב. אורו ליה רבנן לרב ירמיה, ואמרי לה לבריה דרב ירמיה, כמאן דאמר משל אב.

From whose funds must one give his father food and drink? Rav Yehuda says: From the money of the son. Rav Natan bar Oshaya said: From the money of the father. The rabbis gave this following ruling to Rav Yirmeya, and some say they gave this following ruling to the son of Rav Yirmeya: The halakha is like the one who says it must be paid from the money of the father.

מיתיבי: נאמר: ״כבד את אביך ואת אמך״, ונאמר: ״כבד את ה׳ מהונך״. מה להלן בחסרון כיס, אף כאן בחסרון כיס. ואי אמרת משל אב, מאי נפקא ליה מיניה? לביטול מלאכה.

The Talmud raises an objection from the following baraita: It is stated: “Honor your father and your mother” (Exodus 20:11), and it is stated: “Honor YHWH with your wealth” (Proverbs 3:9), which teaches the following verbal analogy: Just as there one honors God “with your wealth,” i.e., through monetary loss, so too here one must honor his father through monetary loss. And if you say that one honors him from the money of the father, what difference does it make to the son, i.e., what monetary loss does he suffer? The Talmud answers: It makes a difference to him with regard to the neglect of his work. Although he is not required to spend his own money, the son must leave aside his work to honor his father, which will cause him some financial loss.

תא שמע: שני אחים, שני שותפין האב ובנו, הרב ותלמידו ⁠– פודין זה לזה מעשר שני, ומאכילין זה לזה מעשר עני.

The Talmud suggests: Come and hear a proof from a baraita: Two brothers, or two partners in the ownership of produce, or a father and son, or a rabbi and his student, may redeem the second tithe for each other without adding 1/5th, as one who redeems the tithe of another, including these individuals, is not required to add 1/5th. And they may feed each other the poor man’s tithe. If one of them is poor, the other may give him the poor man’s tithe that he separated from his produce, and it is not considered as though the pauper ate the poor man’s tithe from his own produce.