Leviticus 25:48-52

48he retains the right of redemption after he has sold himself. One of his brothers may redeem him: 49either his uncle or cousin or any close relative from his clan may redeem him. Or if he prospers, he may redeem himself.

50He and his purchaser will then count the time from the year he sold himself up to the Year of Jubilee. The price of his sale will be determined by the number of years, based on the daily wages of a hired hand. 51If many years remain, he must pay for his redemption in proportion to his purchase price. 52If only a few years remain until the Year of Jubilee, he is to calculate and pay his redemption according to his remaining years.