Matthew 16:1-4

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 today: for the heaven is red and lowering. Ye hypocrites, 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 the prophet. And he left them, and departed.