John Chrysostom (attributed)

(Vict. Ant. e Cat. in Marc.) Matthew says, of the leaven of the Pharisees and of the Sadducees; Luke, however, of the Pharisees only. All three, therefore, name the Pharisees, as being the most important of them, but Matthew and Mark have each mentioned one of the secondary sects; and fitly has Mark added of Herod, as a supplement to Matthew’s narrative, in which they were left out. But in saying this, He by degrees brings the disciples to understanding and faith.