The judges shall investigate thoroughly, and if the witness is proven to be a liar who has falsely accused his brother,

Deuteronomy 25:1
If there is a dispute between men, they are to go to court to be judged, so that the innocent may be acquitted and the guilty condemned.

Psalm 27:12
Do not hand me over to the will of my foes, for false witnesses rise up against me, breathing out violence.

Daniel 6:24
At the command of the king, the men who had falsely accused Daniel were brought and thrown into the den of lions--they and their children and wives. And before they had reached the bottom of the den, the lions overpowered them and crushed all their bones.

And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and has testified falsely against his brother;