Deuteronomy 19:16-20

16If a false witness rise up against any man to testify against him that which is wrong;1 17Then both the men, between whom the controversy is, shall stand before Yhwh, before the priests and the judges, which shall be in those days; 18And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother; 19Then shall ye do unto him, as he had thought to have done unto his brother: so shalt thou put the evil away from among you. 20And those which remain shall hear, and fear, and shall henceforth commit no more any such evil among you.