“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 lowring. 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