Matthew 12:39
He answered, "A wicked and adulterous generation asks for a miraculous sign! But none will be given it except the sign of the prophet Jonah."
2 Kings 14:25
He was the one who restored the boundaries of Israel from Lebo from the entrance to Hamath to the Sea of the Arabah, in accordance with the word of the Lord , the God of Israel, spoken through his servant Jonah son of Amittai, the prophet from Gath Hepher.
The restored borders of Israel (1967), the only sign (and puts forth leaves) given to the wicked.