 Jonah promised the fish that he would save them.Following Jonah's directions, the fish swam up alongside the Leviathan and Jonah threatened to leash the Leviathan by its tongue and let the other fish eat it.The Leviathan heard Jonah's threats, saw that he was circumcised, and realized that he was protected by the Lord, so it fled in terror, leaving Jonah and the fish alive.