Leviticus 20:24; Leviticus 25:46

24 'Hence I have said to you, "You are to possess their land, and I Myself will give it to you to possess it, a land flowing with milk and honey." I am the LORD your God, who has separated you from the peoples.
46 'You may even bequeath them to your sons after you, to receive as a possession; you can use them as permanent slaves. But in respect to your countrymen, the sons of Israel, you shall not rule with severity over one another.