Leviticus 25:44-46

⁴⁴A servant and handmaid be to you of the nations that be in your compass, and of the comelings the which be pilgrims with you,

⁴⁵either they that be born of comelings in your land; ye shall have these servants, and by right of heritage ye shall leave them to your after-comers, and ye shall wield them without end;

⁴⁶soothly oppress ye not by power your brethren, the sons of Israel.