Deuteronomy 19:15-21

¹⁵One witness shall not rise up against a man for any iniquity, or for any sin, in any sin that he sinneth: at the mouth of two witnesses, or at the mouth of three witnesses, shall the matter be established. ¹⁶If a false witness rise up against any man to testify against him that which is wrong; ¹⁷Then both the men, between whom the controversy is, shall stand before the LORD, 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. ²¹And thine eye shall not pity; but life shall go for life, eye for eye, tooth for tooth, hand for hand, foot for foot.