And the judges shall make diligent inquisition,.... Into the case before them, into the nature of the evidence and proof that each witness brings for or against; so the Targum of Jonathan,
"the judges shall interrogate the witness, by whom these things are said, well;''
shall thoroughly examine the testimony given, and look carefully into it:
and, behold, if the witness be a false witness, and hath testified falsely against his brother; it appears plainly by full evidence that he has testified a falsehood of him.