Luke 11:29 TLB

[29] As the crowd pressed in upon him, he preached them this sermon: "These are evil times, with evil people. They keep asking for some strange happening in the skies to prove I am the Messiah, but the only proof I will give them is a miracle like that of Jonah, whose experiences proved to the people of Nineveh that God had sent him. My similar experience will prove that God has sent me to these people.