Albert Barnes Commentary Leviticus 25:23-24

"And the land shall not be sold in perpetuity; for the land is mine: for ye are strangers and sojourners with me. And in all the land of your possession ye shall grant a redemption for the land." — Leviticus 25:23-24 (ASV)

These verses express the principle on which the law of Jubilee, as it regards the land, was based. The land belonged to Yahweh, and it was He who allotted it among the families of Israel for their use. No estate could therefore be alienated in perpetuity, by any human authority, from the family to whose lot it might fall.

Grant a redemption for the land – (Leviticus 25:24) that is, grant power to recover the land to the original holder who had parted with it.