Leviticus 25:44-46

New King James Version

⁴⁴ And as for your male and female slaves whom you may have—from the nations that are around you, from them you may buy male and female slaves. ⁴⁵ Moreover you may buy ^(A)the children of the strangers who dwell among you, and their families who are with you, which they beget in your land; and they shall become your property. ⁴⁶ And ^(B)you may take them as an inheritance for your children after you, to inherit them as a possession; they shall be your permanent slaves. But regarding your brethren, the children of Israel, you shall not rule over one another with rigor.