Nedarim 62A

תנא: הוקפלו רוב המקצועות ⁠— מותרות משום גזל, ופטורות מן המעשרות.

A baraita states: If most of the knives have been set aside, the figs left in the field are permitted with regard to the laws of stealing and are exempt from tithes, since their owners presumably do not want them and the figs are therefore considered ownerless property.

רבי ורבי יוסי בר רבי יהודה איקלעו לההוא אתרא בזמן שהוקפלו רוב המקצועות, רבי הוה קא אכיל, רבי יוסי בר רבי יהודה לא אכיל. אתא מרהון, אמר להו: אמאי לא אכלי רבנן? הוקפלו רוב המקצועות הוא! ואף על פי כן לא אכיל רבי יוסי בר רבי יהודה, קסבר: משום סניות מילתא הוא דקאמר הדין גברא.

The Talmud relates: R' Yehuda HaNasi and R' Yosei bar R' Yehuda arrived at a certain place at a time when most of the knives had been set aside. R' Yehuda HaNasi ate the figs left in the field, but R' Yosei bar R' Yehuda did not eat. The owner of the field came and said to them: Why are the rabbis not eating? It is now the period when most of the knives have been set aside. The Talmud notes: But nevertheless, R' Yosei bar R' Yehuda did not eat, since he thought that it was only due to embarrassment over the matter that that man said his comment, but he did not really mean to declare his figs ownerless.

רבי חמא בר רבי חנינא איקלע לההוא אתרא בזמן שהוקפלו רוב המקצועות, הוה קאכיל, יהיב לשמעיה לא אכיל. אמר ליה: אכול, כך אמר לי רבי ישמעאל בר רבי יוסי משום אביו: הוקפלו רוב המקצועות ⁠— מותרות משום גזל ופטורות מן המעשר.

The Talmud relates another incident: R' Ḥama bar R' Ḥanina arrived at a certain place at a time when most of the knives had been set aside. He ate from the figs that were left in the field, but when he gave some to his attendant the latter did not eat. R' Ḥama said to him: Eat, as R' Yishmael bar R' Yosei said to me the following ruling in the name of his father: If most of the knives have been set aside, the figs are permitted with regard to the laws of stealing and are exempt from the tithe.