Leviticus 25:42

39 If your brother has grown poor with you, and sell himself to you; you shall not make him to serve as a bond-servant.

40 As a hired servant, and as a sojourner, he shall be with you; he shall serve with you to the year of jubilee:

41 then shall he go out from you, he and his children with him, and shall return to his own family, and to the possession of his fathers shall he return.

42 For they are my servants, whom I brought forth out of the land of Egypt: they shall not be sold as bondservants.

43 You shall not rule over him with rigor, but shall fear your God.

44 As for your bondservants, and your bondmaids, whom you shall have; of the nations that are round about you, of them shall you buy bondservants and bondmaids.

45 Moreover of the children of the strangers who sojourn among you, of them shall you buy, and of their families who are with you, which they have conceived in your land: and they shall be your possession.