isaiah 29:21 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. - Free Bible Online

      21. Rather, "Who make a man guilty in his cause" [GESENIUS], that is, unjustly condemn him. "A man" is in the Hebrew a poor man, upon whom such unjust condemnations might be practiced with more impunity than on the rich; compare Isa 29:19, "the meek . . . the poor."
      him that reproveth--rather, "pleadeth"; one who has a suit at issue.
      gate--the place of concourse in a city, where courts of justice were held (Ru 4:11; Pr 31:23; Am 5:10, 12).
      just--one who has a just cause; or, Jesus Christ, "the Just One" [HORSLEY].
      for a thing of naught--rather, "through falsehood," "by a decision that is null in justice" [BARNES]. Compare as to Christ, Pr 28:21; Mt 26:15; Ac 3:13, 14; 8:33.

JFB.