Matthew 16:1 WEB

¹  The Pharisees and Sadducees came, and testing him, asked him to show them a sign from heaven.

²  But he answered them, 'When it is evening, you say, 'It will be fair weather, for the sky is red.'

³  In the morning, 'It will be foul weather today, for the sky is red and threatening.' Hypocrites! You know how to discern the appearance of the sky, but you can't discern the signs of the times!