Mark 8:19

And when Jesus knew it, he saith unto them, Why reason ye, because ye have no bread? perceive ye not yet, neither understand? have ye your heart yet hardened?

Having eyes, see ye not? and having ears, hear ye not? and do ye not remember?

And when the seven 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 understand?