Leviticus 25:40-45

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

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

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

⁴³Thou shalt not rule over him with rigor, but shalt fear thy God.

⁴⁴And as for thy bondmen, and thy bondmaids, whom thou shalt have; of the nations that are round about you, of them shall ye buy bondmen and bondmaids.

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