'Belly of the Fish' in the Bible

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.

And Jonah prayed to Yahweh his God from the belly of the fish

for, as Jonah was in the belly of the fish three days and three nights, so shall the Son of Man be in the heart of the earth three days and three nights.