Deuteronomy 19:18-20

New Revised Standard Version, Anglicised

¹⁸ and the judges shall make a thorough inquiry. If the witness is a false witness, having testified falsely against another, ¹⁹ then you shall do to the false witness just as the false witness had meant to do to the other. So you shall purge the evil from your midst. ²⁰ The rest shall hear and be afraid, and a crime such as this shall never again be committed among you.