Arakhin 34A

הן ומגרשיהן, הן ומגרשיהן למיסתרינהו קיימי. אמר רב אשי: איצטריך, סלקא דעתך אמינא: אדמסתתרי מסתתרי, אי מיזדבני ליחלטו, קא משמע לן.

both they and their empty lots. The Talmud objects: But they and their lots stand to be dismantled, as a city of the Levites may not be surrounded by a wall. How, then, can such a city be considered surrounded by a wall? Rav Ashi said: Nevertheless, it was necessary for the baraita to teach that if a Levite sells a house in such a city he may always redeem it, as it might enter your mind to say: When the walls are dismantled, then they are dismantled, but as long as they remain standing, if houses in the city are sold and are not redeemed within one year, let them belong to the buyer in perpetuity, in accordance with the halakha of houses of walled cities. Therefore, the baraita teaches us that this is not the case.

תנו רבנן: ״כשדה החרם לכהן תהיה אחזתו״, מה תלמוד לומר? מנין לכהן שהקדיש שדה חרמו, שלא יאמר: הואיל ויוצא לכהנים, והרי היא תחת ידי ⁠— תהא שלי.

§ A baraita states: The verse states, with regard to one who consecrated his ancestral field but failed to redeem it before the Jubilee Year: “But the field, when it goes out in the Jubilee, should be holy to YHWH, as a field dedicated; his ancestral field should be for the priest” (Leviticus 27:21). What is the meaning when the verse states: “As a field dedicated”? The baraita explains: From where is it derived with regard to a priest who consecrated his dedicated field, i.e., a field that was dedicated to the priests by an Israelite, and the Jubilee Year arrived, that he may not say: Since a field that was consecrated by its owners and was not redeemed leaves to the possession of the priests in the Jubilee Year, and this field that I consecrated is already in my possession, it is therefore mine.