'Fourth' in the Bible

On the fourth day they said to Samson’s wife, “Persuade your husband to explain the riddle to us, or we will burn you and your father’s household to death. Did you invite us here to rob us?”

And it came to pass on the fourth day, when they arose early in the morning, that he rose up to depart: and the damsel's father said unto his son in law, Comfort thine heart with a morsel of bread, and afterward go your way.