'Three Days and Three Nights' in the Bible

And they gave him a piece of a cake of figs, and two clusters of raisins: and when he had eaten, his spirit came again to him: for he had eaten no bread, nor drunk any water, three days and three nights.

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.

For as Jonah was three days and three nights in the belly of the great fish; so shall the Son of man be three days and three nights in the heart of the earth.