Leviticus 25:35-43

35Now if your countryman becomes destitute and cannot support himself among you, then you are to help him as you would a foreigner or stranger, so that he can continue to live among you. 36Do not take any interest or profit from him, but fear your God, that your countryman may live among you. 37You must not lend him your silver at interest or sell him your food for profit. 38I am the LORD your God, who brought you out of the land of Egypt to give you the land of Canaan and to be your God.

39If a countryman among you becomes destitute and sells himself to you, then you must not force him into slave labor. 40Let him stay with you as a hired worker or temporary resident; he is to work for you until the Year of Jubilee. 41Then he and his children are to be released, and he may return to his clan and to the property of his fathers.

42Because the Israelites are My servants, whom I brought out of the land of Egypt, they are not to be sold as slaves. 43You are not to rule over them harshly, but you shall fear your God.