NET
21 those who bear false testimony against a person, who entrap the one who arbitrates at the city gate and deprive the innocent of justice by making false charges.
Darby
21 that make a man an offender for a word, and lay a snare for him that reproveth in the gate, and pervert [the judgment of] the righteous by futility.
KJV
21 That make a man an offender for a word, and lay a snare for him that reproveth in the gate, and turn aside the just for a thing of nought.