Deuteronomy 19:16-20

16If an unrighteous witness rise up against any man to testify against him of an offence;

17then both the men between whom the controversy is shall stand before Jehovah, before the priests and the judges that shall be in those days;

18and the judges shall make thorough inquiry; and if the witness be a false witness, and he have testified falsely against his brother,

19then shall ye do unto him as he had thought to have done unto his brother; and thou shalt put evil away from thy midst.

20And those that remain shall hear, and fear, and shall henceforth commit no more any such evil in thy midst.