Deuteronomy 19:16-20

16If a false witness shall 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 the LORD, before the priests and the judges, who shall be in those days; 18And the judges shall make diligent inquisition: and, behold, if the witness is a false witness, and hath testified falsely against his brother; 19Then shall ye do to him, as he had thought to do to his brother: so shalt thou remove the evil from among you. 20And those who remain shall hear, and fear, and shall henceforth commit no more any such evil among you.