Matthew 16:1-3

Thomson(i) 1 And the Pharisees and the Sadducees having come thither with a view to try him, desired that he would show them a sign from heaven. 2 Whereupon he in reply said to them, When it is evening you say, It will be fair weather, for the sky is red: 3 and in the morning, there will be a storm today, for the sky is red and lowering. Hypocrites! you know how to distinguish the appearance of the sky, and can you not discern the signs of the times?