Leviticus 18:20

18:20 You must not have sexual intercourse with the wife of your fellow citizen to become unclean with her.

Leviticus 25:37

25:37 You must not lend him your money at interest and you must not sell him food for profit.

Leviticus 25:43

25:43 You must not rule over him harshly, but you must fear your God.