Leviticus 25:44-54

44As for your male and female slaves whom you may have--you may acquire male and female slaves from the pagan nations that are around you. 45Then, too, it is out of the sons of the sojourners who live as aliens among you that you may gain acquisition, and out of their families who are with you, whom they will have 1produced in your land; they also may become your possession. 46You may even bequeath them to your sons after you, to receive as a possession; you can use them as permanent slaves. 2But in respect to your 3countrymen, the sons of Israel, you shall not rule with severity over one another.

47‘Now if the 4means of a stranger or of a sojourner with you becomes sufficient, and a 5countryman of yours becomes so poor with regard to him as to sell himself to a stranger who is sojourning with you, or to the descendants of a stranger’s family, 48then he shall have redemption right after he has been sold. One of his brothers may redeem him, 49or his uncle, or his uncle’s son, may redeem him, or one of his blood relatives from his family may redeem him; or 67if he prospers, he may redeem himself. 50He then with his purchaser shall calculate from the year when he sold himself to him up to the year of jubilee; and the price of his sale shall correspond to the number of years. It is like the days of a hired man that he shall be with him. 51If there are still many years, 8he shall refund part of his purchase price in proportion to them for his own redemption; 52and if few years remain until the year of jubilee, he shall so calculate with him. In proportion to his years he is to refund the amount for his redemption. 53Like a man hired year by year he shall be with him; 9he shall not rule over him with severity in your sight. 54Even if he is not redeemed by 10these means, 11he shall still go out in the year of jubilee, he and his sons with him.