Leviticus 25:44-46 Evangelical Heritage Version (EHV)
44 You may buy a male slave or a female slave for yourself from the nations around you. 45 You may also buy some of the children of those who reside as aliens among you and some of their extended families who are born in your land, so that they become your property. 46 You may leave them to your children as inherited property. You may make them work as slaves for life. But as for your brothers, the Israelites, each of you must not rule over your brother harshly.