Leviticus 25:51-53

Amplified Bible

⁵¹ If there are still many years [before the Year of Jubilee], in proportion to them he must refund [to the purchaser] part of the price of his sale for his redemption and release. ⁵² And if only a few years remain until the Year of Jubilee, he shall so calculate it with him. He is to refund the proportionate amount for his release. ⁵³ Like a man hired year by year he shall deal with him; he shall not rule over him with harshness in your sight.