Matthew 16:4

²  He answered and said unto them, When it is evening, ye say, It will be fair weather: for the sky is red.

³  And in the morning, It will be foul weather to day: for the sky is red and lowering. O ye hypocrites, ye can discern the face of the sky; but can ye not discern the signs of the times?

⁴  A wicked and adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of the prophet Jonas. And he left them, and departed.

⁵  And when his disciples were come to the other side, they had forgotten to take bread.

⁶  Then Jesus said unto them, Take heed and beware of the leaven of the Pharisees and of the Sadducees.