Then the mariners were afraid, and cried every man to his god. They threw the cargo that was in the ship into the sea, to lighten it. But Jonah had gone down into the innermost parts of the ship, and he was laying down, and was fast asleep.
One should contrast this account of Jonah's being asleep on a ship at sea in a storm with the New Testament account of Jesus in a similar situation, as recorded in  Mark 4:38.