Mark 8:11-21

11And the Pharisees came forth, and began to question with him, seeking of him a sign from heaven, trying him. 12And he sighed deeply in his spirit, and saith, Why doth this generation seek a sign? verily I say unto you, There shall no sign be given unto this generation. 13And he left them, and again entering into the boat departed to the other side.

14And they forgot to take bread; and they had not in the boat with them more than one loaf. 15And he charged them, saying, Take heed, beware of the leaven of the Pharisees and the leaven of Herod. 16And they reasoned one with another, saying, We have no bread. 17And Jesus perceiving it saith unto them, Why reason ye, because ye have no bread? do ye not yet perceive, neither understand? have ye your heart hardened? 18Having eyes, see ye not? and having ears, hear ye not? and do ye not remember? 19When I brake the five loaves among the five thousand, how many baskets full of broken pieces took ye up? They say unto him, Twelve. 20And when the seven among the four thousand, how many basketfuls of broken pieces took ye up? And they say unto him, Seven. 21And he said unto them, Do ye not yet understand?