Deuteronomy 19:16-19

If a false witness rises against any man to testify against him of wrongdoing, then both men in the controversy shall stand before the LORD, before the priests and the judges who serve in those days. And the judges shall make careful inquiry, and indeed, if the witness is a false witness, who has testified falsely against his brother, then you shall do to him as he thought to have done to his brother; so you shall put away the evil from among you.