A wicked and adulterous generation seeks after a sign; and no sign shall be given unto it, but the sign of the prophet Jonah. And he left them and departed. And when his disciples were coming from the other side, they had forgotten to take bread. Then Jesus said unto them, Take heed and keep yourselves from 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 ye of little faith, why reason ye among yourselves that 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 did not speak to you concerning bread that ye should keep yourselves from the leaven of the Pharisees and of the Sadducees? Then they understood that he bade them not to keep themselves from the leaven of bread, but from 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 commanded them, saying, Take heed, beware of the leaven of the Pharisees and of the leaven of Herod. read more.
And they argued among themselves, saying, It is because we have no bread. And as Jesus understood it, he said unto them, Why argue ye because ye have no bread? Do ye not consider nor understand? is your heart yet blind? Having eyes, see ye not? and having ears, hear ye not? and do ye not remember? When I broke the five loaves among five thousand, how many baskets full of fragments took ye up? They said unto him, Twelve. And when the seven loaves among four thousand, how many baskets full of fragments took ye up? And they said, Seven. And he said unto them, How is it that ye do not yet understand?