Deuteronomy 19
15 Ref One witness may not make a statement against a man in relation to any sin or wrongdoing which he has done: on the word of two or three witnesses a question is to be judged.
16 Ref If a false witness makes a statement against a man, saying that he has done wrong,
17 Ref Then the two men, between whom the argument has taken place, are to come before the Lord, before the priests and judges who are then in power;
18 Ref And the judges will have the question looked into with care: and if the witness is seen to be false and to have made a false statement against his brother,
19 Ref Then do to him what it was his purpose to do to his brother: and so put away the evil from among you.
20 Ref And the rest of the people, hearing of it, will be full of fear, and never again do such evil among you.
21 Ref Have no pity; let life be given for life, eye for eye, tooth for tooth, hand for hand, foot for foot.