Leviticus 25:39-46

39‘And if one of your brethren who dwells by you becomes poor, and sells himself to you, you shall not compel him to serve as a slave.

40As a hired servant and a sojourner he shall be with you, and shall serve you until the Year of Jubilee.

41And then he shall depart from you—he and his children with him—and shall return to his own family. He shall return to the possession of his fathers.

42For they are My servants, whom I brought out of the land of Egypt; they shall not be sold as slaves.

43You shall not rule over him with rigor, but you shall fear your God.

44And 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.

45Moreover you may buy 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.

46And 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.