Leviticus 25:42-44

New Revised Standard Version, Anglicised

⁴² For they are my servants, whom I brought out of the land of Egypt; they shall not be sold as slaves are sold. ⁴³ You shall not rule over them with harshness, but shall fear your God. ⁴⁴ As for the male and female slaves whom you may have, it is from the nations around you that you may acquire male and female slaves.