Exodus 7:25
And seven days were fulfilled, after the LORD had smitten the river.
Exodus 8:9-10
And Moses said unto Pharaoh, You tell me: when shall I entreat for you, and for your servants, and for your people, to destroy the frogs from you and your houses, that they may remain in the river only?
Exodus 10:23
They saw not one another, neither rose any from his place for three days: but all the children of Israel had light in their dwellings.
2 Samuel 24:13
So Gad came to David, and told him, and said unto him, Shall seven years of famine come unto you in your land? or will you flee three months before your enemies, while they pursue you? or shall there be three days' pestilence in your land? now consider, and see what answer I shall return to him that sent me.