Leviticus 25:23-28

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. If thy brother be waxed poor, and sell some of his possession, then shall his kinsman that is next unto him come, and shall redeem that which his brother hath sold. And if a man have no one to redeem it, and he be waxed rich and find sufficient to redeem it; then let him reckon the years of the sale thereof, and restore the overplus unto the man to whom he sold it; and he shall return unto his possession. But if he be not able to get it back for himself, then that which he hath sold shall remain in the hand of him that hath bought it until the year of jubilee: and in the jubilee it shall go out, and he shall return unto his possession.