Matthew 16:8-12

But Jesus, aware of this, said, “You men of little faith, why are you discussing among yourselves the fact that you have no bread?

Do you not yet understand nor remember the five loaves of the five thousand, and how many baskets you picked up?

Nor the seven loaves of the four thousand, and how many large baskets you picked up?

How is it that you do not understand that I did not speak to you about bread? But beware of the leaven of the Pharisees and Sadducees.”

Then they understood that He did not say to beware of the leaven of bread, but of the teaching of the Pharisees and Sadducees. Peter’s Confession of Christ