תלמוד על גיטין 2:3

Rebbi Eleazar said, this follows the Elders of Galilea, for the Elders of Galilea say, it is forbidden to hand over food for two meals to a person suspect in matters of Sabbatical¹³⁹This refers to the last part of the Mishnah, where one has to be careful in a Sabbatical year not to buy the edible etrog from a person trading in Sabbatical produce. The Elders of Galilee do not permit to deal with such a person except for the absolute necessities of sustenance.. Rebbi Mattaniah said, explain it as opinion of everybody, in case that etrogim are sold at an elevated price¹⁴⁰In this case there are great incentives to trade in etrogim in the Sabbatical year. The only way not to “put a stone before a blind man”, in this case to prevent the non-observant from trading in etrogim, is to eliminate all considerations of money from the transfer of possession of the etrog.. ¹⁴¹Gittin2:3, Note 68. As the following: The cedrats¹⁴²Persian turung, Farsi תרנגִ toranj, used for all citrus fruits. were scarce there when Rav Naḥman bar Jacob gave an etrog as gift to his son and told him, if you have acquired it and fulfilled its obligation, return it to me¹⁴³This proves that the requirement that the etrog must be the personal property of the user may be satisfied even by a gift given on condition that it be returned; therefore certainly a permanent gift as described in the Mishnah..