'Three Days and Three Nights' in the Bible

They gave him a slice of fig cake and two raisin cakes; he ate and {this revived him}, because he had not eaten food or drunk water [for] three days and three nights.

And Yahweh provided a large fish to swallow up Jonah, and Jonah was in the belly of the fish three days and three nights.

For just 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.