And the judges shall make careful inquiry, and indeed, if the witness is a false witness, who has testified falsely against his brother,
Deuteronomy 19:18
Surrounding context
19:17 then both men in the controversy shall stand before the LORD, before the priests and the judges who serve in those days.
19:18 And the judges shall make careful inquiry, and indeed, if the witness is a false witness, who has testified falsely against his brother,
19:19 then you shall do to him as he thought to have done to his brother; so you shall put away the evil from among you.