Leviticus 25:46-48

New Revised Standard Version, Anglicised

⁴⁶ You may keep them as a possession for your children after you, for them to inherit as property. These you may treat as slaves, but as for your fellow Israelites, no one shall rule over the other with harshness.

⁴⁷ If resident aliens among you prosper, and if any of your kin fall into difficulty with one of them and sell themselves to an alien, or to a branch of the alien’s family, ⁴⁸ after they have sold themselves they shall have the right of redemption; one of their brothers may redeem them,