Leviticus 25:39-46

39‘And if your fellow countryman becomes so poor [in his dealings] with you that he sells himself to you [as payment for a debt], you shall not let him do the work of a slave [who is ineligible for redemption],

40but he is to be with you as a hired man, as if he were a temporary resident; he shall serve with you until the Year of Jubilee,

41and then he shall leave you, he and his children with him, and shall go back to his own family and return to the property of his fathers.

42For the Israelites are My servants whom I brought out of the land of Egypt; they shall not be sold in a slave sale.

43You shall not rule over him with harshness (severity, oppression), but you are to fear your God [with profound reverence].

44As for your male and female slaves whom you may have—you may acquire male and female slaves from the pagan nations that are around you.

45Moreover, from the children of the strangers who live as aliens among you, from them you may buy slaves and from their families who are with you, whom they have produced in your land; they may become your possession.

46You may even bequeath them as an inheritance to your children after you, to receive as a possession; you can use them as permanent slaves. But in respect to your fellow countrymen, the children of Israel, you shall not rule over one another with harshness (severity, oppression).