Luke 11:16

Then certain of the scribes and of the Pharisees answered, saying, Master, we would see a sign from thee.

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.

And the Pharisees came forth, and began to question with him, seeking of him a sign from heaven, tempting him.

They said therefore unto him, What sign shewest thou then, that we may see, and believe thee? what dost thou work?

For the Jews require a sign, and the Greeks seek after wisdom: