Leviticus 25:34

וּֽשְׂדֵ֛ה מִגְרַ֥שׁ עָרֵיהֶ֖ם לֹ֣א יִמָּכֵ֑ר כִּֽי־אֲחֻזַּ֥ת עוֹלָ֛ם ה֖וּא לָהֶֽם׃ ס

καὶ οἱ ἀγροὶ ἀφωρισμένοι ταῖς πόλεσιν αὐτῶν οὐ πραθήσονται, ὅτι κατάσχεσις αἰωνία τοῦτο ἀυτῶν ἐστιν.

Greek text from Swete's edition, CC BY-SA 4.0

Mas la tierra del ejido de sus ciudades no se venderá, porque es perpetua posesión de ellos.

But the open pastureland around their cities may not be sold, for this is their permanent possession. Redemption of the Poor