A wicked and adulterous generation seeks after a sign; and there shall no sign be given unto it, but the sign of the prophet Jonah. And he left them, and departed. And when his disciples came to the other side, they had forgotten to take bread. Then Jesus said unto them, Take heed and beware of the leaven of the Pharisees and of the Sadducees. read more.
And they reasoned among themselves, saying, It is because we have taken no bread. Which when Jesus perceived, he said unto them, O you of little faith, why reason you among yourselves, because you have brought no bread? Do you not yet understand, neither remember the five loaves of the five thousand, and how many baskets you took up? Neither the seven loaves of the four thousand, and how many baskets you took up? How is it that you do not understand that I spoke not to you concerning bread, that you should beware of the leaven of the Pharisees and of the Sadducees? Then understood they that he bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees.

And he left them, and entering into the ship again departed to the other side. Now the disciples had forgotten to take bread, neither had they in the ship with them more than one loaf. And he charged them, saying, Take heed, beware of the leaven of the Pharisees, and of the leaven of Herod. read more.
And they reasoned among themselves, saying, It is because we have no bread. And when Jesus knew it, he said unto them, Why reason you, because you have no bread? perceive you not yet, neither understand? have you your heart yet hardened? Having eyes, see you not? and having ears, hear you not? and do you not remember? When I broke the five loaves among five thousand, how many baskets full of fragments took you up? They said unto him, Twelve. And when the seven among four thousand, how many baskets full of fragments took you up? And they said, Seven. And he said unto them, How is it that you do not understand?