Matthew 16:1-4

1The Pharisees and Sadducees approached, and tested him, asking him to show them a sign from heaven.

2He replied, “When evening comes you say, ‘It will be good weather because the sky is red.’

3And in the morning, ‘Today will be stormy because the sky is red and threatening.’ You know how to read the appearance of the sky, but you can’t read the signs of the times.

4An evil and adulterous generation demands a sign, but no sign will be given to it except the sign of Jonah.” Then he left them and went away.