Leviticus [Pertaining to Levites] 25:42-46

⁴²For they are my servants, whom I brought out of the land of Egypt Abode of slavery. They shall not be sold as slaves.

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

⁴⁴“‘As for your male and your female slaves, whom you may have; of the nations that are around you, from them you may buy male and female slaves.

⁴⁵Moreover of the children of the aliens who live among you, of them you may buy, and of their families who are with you, which they have conceived in your land; and they will be your property.

⁴⁶You may make them an inheritance for your children after you, to hold for a possession; of them may you take your slaves forever; but over your brothers the children of Israel God prevails you shall not rule, one over another, with harshness. (LY:7)