From Proverbs 3:

Do not plan evil against your neighbor,
who dwells trustingly beside you.
Do not contend with a man for no reason,
when he has done you no harm.
Do not envy a man of violence
and do not choose any of his ways,
for the devious person is an abomination to the Lord,
but the upright are in his confidence.

The first four lines seem pretty self-evident. But I wonder if this neighbor is himself the violent man you must not emulate even in trying to “fight fire with fire” against him. The statement is that “he has done you know harm,” but I wonder if Proverbs 24 is the same situation:

Be not a witness against your neighbor without cause,
and do not deceive with your lips.
Do not say, “I will do to him as he has done to me;
I will pay the man back for what he has done.”

“For no reason,” “he has done you know harm,” “without cause,” are all assertions made against what you want to believe. You think it is payback time and Solomon is telling you otherwise.