וְאִם֙ אֶת־שְׂדֵ֣ה מִקְנָת֔וֹ אֲשֶׁ֕ר לֹ֖א מִשְּׂדֵ֣ה אֲחֻזָּת֑וֹ יַקְדִּ֖ישׁ לַֽיהוָֽה׃
A jeżeliby kto pole kupne swoje, nie należące do pól dziedzicznych jego, poświęcił Wiekuistemu, -
English Explanation of Mishnah Arakhin
If one bought a field from his father, and his father died and afterwards he consecrated it, it is considered a field of possession. A field that is not a “field of possession” reverts to its original owner during the Jubilee, as is stated in Leviticus 27:22-24. When a son buys a field from his father, it is questionable whether that field is considered a “field of possession” because it might eventually become his possession, or whether we treat this as a field that was purchased. If the father dies and then the son consecrates the field, it is considered a field of possession because even if the son had not bought the field, it would have become his (or at least partly his) before he consecrated it.
English Explanation of Mishnah Arakhin
If he consecrated it and afterwards his father died, then it is considered a field acquired by purchase, the words of Rabbi Meir. Rabbi Judah and Rabbi Shimon say: it is considered a field of possession, as it is said: “And if a field which he has, which is not a field of his possession” (Leviticus 27:22) a field which is not capable of becoming a field of his possession, thus excluding a field which is capable of becoming a field of possession. However, if he consecrated it before his father died, there is a debate as to the status of the field. According to Rabbi Meir it is considered a field acquired by purchase. If he redeems it, he need not add an extra fifth, as is the rule with a field of possession. And if he doesn’t redeem it, during the Jubilee it reverts to its original owners. Rabbis Shimon and Judah disagree and derive through a midrash that any field that could become one’s through inheritance cannot be put into the category of a purchased field. Therefore, even if he dedicates the field purchased from his father before his father dies, it still retains the status of a “field of possession.” If he redeems it he will need to add an extra fifth, and if he doesn’t redeem it, it will become the possession of the priests during the Jubilee year.