'Three Days and Three Nights' in the Bible

And they will give to him a piece of a cake of dried figs and two bunches of dried grapes: and he will eat and his spirit will turn back to him, for he ate not bread and drank not water three days and three nights.

And Jehovah will prepare a great fish to swallow down Jonah: and Jonah will be in-the bowels of the fish three days and three nights.

For as Jonas was in the whale's belly three days and three nights; so shall the Son of man be in the heart of the earth three days and three nights.