Matthew 16:1-9

1The Pharisees also and the Sadducees came, and tempting desired him that he would show them a sign from heaven. 2He answered and said to them, When it is evening, ye say, It will be fair weather: for the sky is red. 3And in the morning, It will be foul weather to day: for the sky is red and threatening. O ye hypocrites, ye can discern the face of the sky; but can ye not discern the signs of the times? 4A wicked and adulterous generation seeketh for a sign; and there shall no sign be given to it, but the sign of the prophet Jonah. And he left them, and departed.

5And when his disciples had come to the other side, they had forgotten to take bread. 6Then Jesus said to them, Take heed and beware of the leaven of the Pharisees and of the Sadducees. 7And they reasoned among themselves, saying, It is because we have taken no bread. 8Which when Jesus perceived, he said to them, O ye of little faith, why reason ye among yourselves, because ye have brought no bread? 9Do ye not yet understand, neither remember the five loaves of the five thousand, and how many baskets ye took up?