The Pharisees also with the Sadducees came, and tempting desired him that he would shew them a sign from heaven.
He answered and said unto them, When it is evening, ye say, It will be fair weather: for the sky is red.
And in the morning, It will be foul weather to day: for the sky is red and lowering. O ye hypocrites, ye can discern the face of the sky; but can ye not discern the signs of the times?
A wicked and adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of the prophet Jonas. And he left them, and departed.
Matthew 16 :1-4
And he said also to the people, When ye see a cloud rise out of the west, straightway ye say, There cometh a shower; and so it is.
And when ye see the south wind blow, ye say, There will be heat; and it cometh to pass.
Ye hypocrites, ye can discern the face of the sky and of the earth; but how is it that ye do not discern this time?
Yea, and why even of yourselves judge ye not what is right?
Luke 12: 54-57.