Thematic Bible: Jesus warns his disciples against

Presently Jesus said to them: "Take care and be on your guard against the leaven of the Pharisees and Sadducees." But the disciples began talking among themselves about their having brought no bread. On noticing this, Jesus said: "Why are you talking among yourselves about your being short of bread, O men of little faith? read more.
Do not you yet see, nor remember the five loaves for the five thousand, and how many baskets you took away? Nor yet the seven loaves for the four thousand, and how many basketfuls you took away? How is it that you do not see that I was not speaking about bread? Be on your guard against the leaven of the Pharisees and Sadducees." Then they understood that he had told them to be on their guard, not against the leaven of bread, but against the teaching of the Pharisees and Sadducees.