Matthew 16:13 (KJV)

Which when Jesus perceived, he said unto them, O ye of little faith, why reason ye among yourselves, because ye have brought no bread?

Do ye not yet understand, neither remember the five loaves of the five thousand, and how many baskets ye took up?

Neither the seven loaves of the four thousand, and how many baskets ye took up?

How is it that ye do not understand that I spake it not to you concerning bread, that ye should beware of the leaven of the Pharisees and of the Sadducees?

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.

And they said, Some say that thou art John the Baptist: some, Elias; and others, Jeremias, or one of the prophets.

He saith unto them, But whom say ye that I am?

And Simon Peter answered and said, Thou art the Christ, the Son of the living God.

And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven.

And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.