Sign of Jonah referred to our Lord’s resurrection to come (Acts 2:22-36). Jonah was at the door of death, and God kept him alive with a miracle.
Why? How do we know it didn't refer to the bottle gourd miracle?
In spite of all Jesus did to prove who He was, using miraculous, unfathomable healings, and words of incredible wisdom that baffled the most learned of men, they still asked for a sign.
So jesus says there will be no miraculous sign, but then he performs miracles as a sign to prove that they should trust him when he says there will be no miraculous sign?
Any of that sound familair?
Yes, it reminds me of a lot of the Bible, but in particular 1 Samuel 4:13-15:
13 When he came, behold, ( N ) Eli was sitting on his seat by the road eagerly watching, because his heart was trembling for the ark of God. So the man came to tell it in the city, and all the city cried out.
14 When Eli heard the noise of the outcry, he said, "What does the noise of this commotion mean?" Then the man came hurriedly and told Eli.
15 Now Eli was ninety-eight years old, and ( O ) his eyes were set so that he could not see.
In verse 13 Eli was watching something, in verse 15 he was blind. So it reminds of a lot of the Bible, contradictory and self inconsistent.