Deuteronomy 19:18 KJV
And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother;
Deuteronomy 19:16–20 KJV Chapter Context
16
If a false witness rise up against any man to testify against him that which is wrong;
17
Then 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;
18
And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother;
19
Then 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.
20
And those which remain shall hear, and fear, and shall henceforth commit no more any such evil among you.