'Three Days and Three Nights' in the Bible

Then they gave him some pressed figs and two clusters of raisins. After he ate he revived, for he hadn’t eaten food or drunk water for three days and three nights.

Now the Lord had appointed a huge fish to swallow Jonah, and Jonah was in the fish three days and three nights.

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