Matthew 16:1-9

1And the Pharisees and Sadducees came, and trying him asked him to show them a sign from heaven. 2But he answered and said unto them, When it is evening, ye say, It will be fair weather: for the heaven is red. 3And in the morning, It will be foul weather to-day: for the heaven is red and lowering. Ye know how to discern the face of the heaven; but ye cannot discern the signs of the times. 4An evil and adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of Jonah. And he left them, and departed.

5And the disciples came to the other side and forgot to take bread. 6And Jesus said unto them, Take heed and beware of the leaven of the Pharisees and Sadducees. 7And they reasoned among themselves, saying, We took no bread. 8And Jesus perceiving it said, O ye of little faith, why reason ye among yourselves, because ye have no bread? 9Do ye not yet perceive, neither remember the five loaves of the five thousand, and how many baskets ye took up?