Exodus 7:25
And seven days were fulfilled, - after Yahweh had smitten the river.
Exodus 8:9-10
And Moses said to Pharaoh - Explain thyself unto me: For what time, shall I make entreaty for thee and for thy servants and for thy people, to cause the frogs to be cut off, from thee and from thy houses, - only in the river, shall they remain?
Exodus 10:23
they saw not one another neither rose any man from his couch for three days, - but all the sons of Israel, had light in their dwellings.
2 Samuel 24:13
So Gad came in unto David, and told him, - and said to him: Shall there come unto thee seven years of famine in thy land? Or, for three months, wilt thou flee before thine enemies while, they, pursue thee? Or shall there be, for three days, pestilence in thy land? Now, consider and see, what, answer, I shall return to him that sent me.