'Perpetuity' in the Bible

But if it's not redeemed by the end of a full year, then the house next to which is a wall is to belong in perpetuity to the one who bought it throughout his generations. It is not to be returned in the jubilee.

You may give them as inherited property to your children after you, to own as properties in perpetuity. You may make bond slaves of them, but no one is to rule over his fellow Israeli with harshness.