Leviticus 25:45-47

⁴⁵And of the sons of the sojourners that are among you, of these you° shall buy and of their relations, all that shall be in your lands; let them be to you for a possession.

⁴⁶And you° shall distribute them to your children after you, and they shall be to you permanent possessions for ever: but of your brethren the children of Israel, one shall not oppress his brother in labors.

⁴⁷And if a stranger or sojourner with you wax rich, and your brother in distress be sold to the stranger or the sojourner that is with you, or to a proselyte by extraction;