Leviticus 25:44

44.Both thy bond-men, and thy bond-maids. What God here permits as regards strangers was everywhere customary among the Gentiles, viz., that their power over their slaves should exist not only until their death, but should continue in perpetual succession to their children; for this is the force of the expression, “ye shall possess them for your children,” that the right of ownership should pass to their heir’s also; nor is there a distinction made only as to perpetuity, (153) but also as to the mode of their treatment. For we must observe the antithesis, “ye shall make use of their service, but over his brother no man shall rule with rigor;” (154) whence it appears that a restraint was imposed upon them lest they should imperiously rule the children of Abraham, and not leave them half their liberty in comparison with the Gentiles. Not that a tyrannical or cruel exercise of power oyer strangers was allowed, but that God would have the race of Abraham, whose liberator lie was, exempted by certain privileges from the common lot.