Matthew 16:11-13

Young's Literal Translation

¹¹ how do ye not understand that I did not speak to you of bread -- to take heed of the leaven of the Pharisees and Sadducees?'

¹² Then they understood that he did not say to take heed of the leaven of the bread, but of the teaching, of the Pharisees and Sadducees.

¹³ And Jesus, having come to the parts of Cesarea Philippi, was asking his disciples, saying, `Who do men say me to be -- the Son of Man?'