Leviticus 25:42

39 And if thy brother [that dwelleth] by thee be waxen poor, and be sold unto thee; thou shalt not compel him to serve as a bondservant:

40 [But] as an hired servant, [and] as a sojourner, he shall be with thee, [and] shall serve thee unto the year of jubile:

41 And [then] shall he depart from thee, [both] he and his children with him, and shall return unto his own family, and unto the possession of his fathers shall he return.

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

43 Thou shalt not rule over him with rigour; but shalt fear thy God.

44 Both thy bondmen, and thy bondmaids, which thou shalt have, [shall be] of the heathen that are round about you; of them shall ye buy bondmen and bondmaids.

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