The Pharisees and Sadducees approached, and as a test, asked Him to show them a sign from heaven.
He answered them: "When evening comes you say, 'It will be good weather because the sky is red.'
And 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.
An evil and adulterous generation wants a sign, but no sign will be given to it except the sign of Jonah." Then He left them and went away.