And he charged them, saying, Take heed, beware of the leaven of the Pharisees - “and of the Sadducees” (Mat 16:6).
and of the leaven of Herod - The teaching or “doctrine” (Mat 16:12) of the Pharisees and of the Sadducees was quite different, but both were equally pernicious; and the Herodians, though rather a political party, were equally envenomed against our Lord’s spiritual teaching. See on Mat 12:14. The penetrating and diffusive quality of leaven, for good or bad, is the ground of the comparison.