Deuteronomy 19:16-19

16“If a malicious witness testifies against someone accusing him of a crime,

17the two people in the dispute are to stand in the presence of the Lord before the priests and judges in authority at that time.

18The judges are to make a careful investigation, and if the witness turns out to be a liar who has falsely accused his brother,

19you must do to him as he intended to do to his brother. You must purge the evil from you.