Deuteronomy 19:16-21

CLV(i) 16 In case a malicious witness should rise against a man asserting his defection, 17 then the two men who have the contention must stand before Yahweh and before the priests and the judges who shall come to be in those days. 18 The judges will inquire diligently, and behold, should the false witness assert false testimony against his brother, 19 then you must do to him just as he schemed to do to his brother. Thus you will eradicate the evil from among you. 20 The remainder shall hearken and fear, and they shall no longer continue to do anything like this evil matter among you. 21 Your eye shall not commiserate:soul for soul, eye for eye, tooth for tooth, hand for hand, foot for foot.