Gittin 47B

טבל וחולין מעורבין זה בזה, דברי רבי. רבן שמעון בן גמליאל אומר: של גוי ⁠– פטור, ושל ישראל ⁠– חייב.

the produce grown in that field is considered to be untithed produce and non-sacred produce mixed together; this is the statement of R' Yehuda HaNasi. Rabban Shimon ben Gamliel says: The portion of the non-Jew is exempt from terumot and tithes, and the portion of the Jew is obligated.

עד כאן לא פליגי אלא דמר סבר ״יש ברירה״. ומר סבר ״אין ברירה״; אבל דכולי עלמא ⁠– יש קנין לגוי בארץ ישראל להפקיע מיד מעשר!

The Talmud explains the inference: They disagree only with regard to the following issue: That one Sage, Rabban Shimon ben Gamliel, holds that there is retroactive clarification, i.e., when they divide the produce, it will be clarified who owned what produce from the outset. And one Sage, R' Yehuda HaNasi, holds that there is no retroactive clarification, and therefore, since it grew in a mixed state, it retains that status even after they divide the produce. However, everyone agrees that a non-Jew has the capability of acquisition of land in Eretz Yisrael to cause the abrogation of the sanctity of the land, removing it from the obligation to tithe its produce, as the non-Jew’s portion is considered to be non-sacred produce.

הכא נמי בסוריא; וקסבר כיבוש יחיד לא שמיה כיבוש.

The Talmud answers: Here, also, it is referring to a case in Syria, and he holds that the conquest of an individual is not called a conquest, and a non-Jew has the capability of acquisition of land in Syria to cause the abrogation of the sanctity of the land.

אמר רב חייא בר אבין, תא שמע: המוכר שדהו לגוי ⁠– לוקח ומביא ביכורים מפני תיקון העולם. מפני תיקון העולם ⁠– אין, מדאורייתא ⁠– לא!

Rav Ḥiyya bar Avin said: Come and hear a proof from the Mishnah: One who sells his field to a non-Jew must purchase and bring the first fruits from the field that he sold, for the betterment of the world. Rav Ḥiyya bar Avin infers: For the betterment of the world, yes, he must bring the first fruits; however, by Torah law, no, he is not required. This teaches that the acquisition of a non-Jew causes the abrogation of the sanctity of the land.