Exodus 7:25
And seven days were fulfilled, after Jehovah had smitten the river.
Exodus 8:9-10
And Moses said to Pharaoh, Glory over me, for what time shall I intreat for thee, and for thy bondmen, and for thy people, to cut off the frogs from thee and from thy houses; so that they shall 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
And Gad came to David, and told him, and said to him, Shall seven years of famine come to thee in thy land? or wilt thou flee three months before thine adversaries while they pursue thee? or shall there be three days' pestilence in thy land? Now be aware and consider what word I shall bring again to him that sent me.