Matthew 16:8-12

8And Jesus knowing [it], said, Why reason ye among yourselves, O ye of little faith, because ye have taken no bread?

9Do ye not yet understand nor remember the five loaves of the five thousand, and how many hand-baskets ye took [up]?

10nor the seven loaves of the four thousand, and how many baskets ye took [up]?

11How do ye not understand that [it was] not concerning bread I said to you, Beware of the leaven of the Pharisees and Sadducees?

12Then they comprehended that he did not speak of being beware of the leaven of bread, but of the doctrine of the Pharisees and Sadducees.