Deuteronomy 19:15

11But if any man hates his neighbor, lies in wait for him, rises up against him, strikes him mortally so that he dies, and he flees into one of these cities;

12then the elders of his city shall send and bring him there, and deliver him into the hand of the avenger of blood, that he may die.

13Your eye shall not pity him, but you shall purge the innocent blood from Israel that it may go well with you.

14You shall not remove your neighbor’s landmark, which they of old time have set, in your inheritance which you shall inherit, in the land that the LORD your God gives you to possess.

15One witness shall not rise up against a man for any iniquity, or for any sin that he sins. At the mouth of two witnesses, or at the mouth of three witnesses, shall a matter be established.

16If an unrighteous witness rises up against any man to testify against him of wrongdoing,

17then both the men, between whom the controversy is, shall stand before the LORD, before the priests and the judges who shall be in those days;

18and the judges shall make diligent inquisition; and behold, if the witness is a false witness, and has testified falsely against his brother,

19then you shall do to him as he had thought to do to his brother. So you shall remove the evil from among you.