2 Kings 20:9

⁷This shall be the sign to you from the LORD, that the LORD will do this thing that he has spoken. ⁸Behold, I will cause the shadow on the sundial, which has gone down on the sundial of Ahaz with the sun, to return backward ten steps.”’” So the sun returned ten steps on the sundial on which it had gone down.

¹¹The Pharisees came out and began to question him, seeking from him a sign from heaven and testing him. ¹²He sighed deeply in his spirit and said, “Why does this generation^[+] seek a sign? Most certainly I tell you, no sign will be given to this generation.”

²⁹When the multitudes were gathering together to him, he began to say, “This is an evil generation. It seeks after a sign. No sign will be given to it but the sign of Jonah the prophet. ³⁰For even as Jonah became a sign to the Ninevites, so the Son of Man will also be to this generation.

¹The Pharisees and Sadducees came, and testing him, asked him to show them a sign from heaven. ²But he answered them, “When it is evening, you say, ‘It will be fair weather, for the sky is red.’ ³In the morning, ‘It will be foul weather today, for the sky is red and threatening.’ Hypocrites! You know how to discern the appearance of the sky, but you can’t discern the signs of the times! ⁴An evil and adulterous generation seeks after a sign, and there will be no sign given to it, except the sign of the prophet Jonah.” He left them and departed.