Leviticus 18:5

18:5 So you must keep my statutes and my regulations; anyone who does so will live by keeping them. I am the Lord.

Leviticus 25:51-52

25:51 If there are still many years, in keeping with them he must refund most of the cost of his purchase for his redemption, 25:52 but if only a few years remain until the jubilee, he must calculate for himself in keeping with the remaining years and refund it for his redemption.