21 those who with a word make someone out to be guilty, who ensnare the defender in court and with false testimony deprive the innocent of justice.

Read Isaiah 29:21 Using Other Translations

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.
who by a word make a man out to be an offender, and lay a snare for him who reproves in the gate, and with an empty plea turn aside him who is in the right.
Those who convict the innocent by their false testimony will disappear. A similar fate awaits those who use trickery to pervert justice and who tell lies to destroy the innocent.