Jonah 1:17
"Now the LORD had prepared a great fish to swallow up Jonah. And Jonah was in the belly of the fish three days and three nights."Jonah 1:17 (KJV)
Context from Jonah 1
15
So they took up Jonah, and cast him forth into the sea: and the sea ceased from her raging.
16
Then the men feared the LORD exceedingly, and offered a sacrifice unto the LORD, and made vows.
17
Now the LORD had prepared a great fish to swallow up Jonah. And Jonah was in the belly of the fish three days and three nights.