Matthew 16:12

Overview - Matthew 16
The Pharisees require a sign.
Jesus warns his disciples of the leaven of the Pharisees and Sadducees.
13 The people's opinion of Christ,
16 and Peter's confession of him.
21 Jesus foretells his death;
23 reproves Peter for dissuading him from it;
24 and admonishes those that will follow him, to bear the cross.
Treasury of Scripture Knowledge

Matthew 16:12  (King James Version)
Then understood they how that he bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees.

15:4-9 23:13-28 Acts 23:8