The life and death of Jesus Christ (pbuh)
The sign given to the Ninevites by Jonah was he was saved from certain death. He stayed for a period of time in danger, but ultimately recovered. He went alive into the belly of the fish, stayed alive for days, and came out alive. The same fate was prophesied for Jesus. He would enter the tomb alive, stay alive for days, and come out alive. If Jesus had died, there would be little resemblance to Jonah. The story of Jonah is one of survival — not revival.