Mark 8:11-21

11The Pharisees came and began to argue with him, seeking from him a sign from heaven to test him. 12And he sighed deeply in his spirit and said, “Why does this generation seek a sign? Truly, I say to you, no sign will be given to this generation.” 13And he left them, got into the boat again, and went to the other side. 14Now they had forgotten to bring bread, and they had only one loaf with them in the boat. 15And he cautioned them, saying, “Watch out; beware of the leaven of the Pharisees and the leaven of Herod.” 16And they began discussing with one another the fact that they had no bread. 17And Jesus, aware of this, said to them, “Why are you discussing the fact that you have no bread? Do you not yet perceive or understand? Are your hearts hardened? 18Having eyes do you not see, and having ears do you not hear? And do you not remember? 19When I broke the five loaves for the five thousand, how many baskets full of broken pieces did you take up?” They said to him, “Twelve.” 20“And the seven for the four thousand, how many baskets full of broken pieces did you take up?” And they said to him, “Seven.” 21And he said to them, “Do you not yet understand?”