Leviticus 25:44-46 Modern English Version (MEV)
44 Both your male and female slaves, whom you may have, they shall be bought from the nations that are around you. 45 Moreover of the foreigners who sojourn among you and of their families who are with you, who were born in your land, you may also buy from them, and they may be your possession. 46 You may take them as an inheritance for your children after you, for their possession. They shall be your slaves forever. But over your brothers, the children of Israel, you shall not rule over one another with rigor.