Deuteronomy 19:17

then both men in the controversy shall stand before the LORD, before the priests and the judges who serve in those days.

Surrounding context

19:16 If a false witness rises against any man to testify against him of wrongdoing,

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,

Translation and sources