18 and the judges shall make diligent inquisition: and, behold, if the witness is a false witness, and has testified falsely against his brother; 19 then you shall do to him as he had thought to do to his brother: so you shall put away the evil from the midst of you. 20 Those who remain shall hear, and fear, and shall henceforth commit no more any such evil in the midst of you.
Matthew Henry's Commentary on Deuteronomy 19:18-20
Commentary on Deuteronomy 19:15-21
(Read Deuteronomy 19:15-21)
Sentence should never be passed upon the testimony of one witness alone. A false witness should suffer the same punishment which he sought to have inflicted upon the person he accused. Nor could any law be more just. Let all Christians not only be cautious in bearing witness in public, but be careful not to join in private slanders; and let all whose consciences accuse them of crime, without delay flee for refuge to the hope set before them in Jesus Christ.