Exodus 7:25
And seven days are completed after Jehovah's smiting the River,
Exodus 8:9-10
And Moses saith to Pharaoh, 'Beautify thyself over me; when do I make supplication for thee, and for thy servants, and for thy people, to cut off the frogs from thee and from thy houses -- only in the River they do remain?'
Exodus 10:23
they have not seen one another, and none hath risen from his place three days; and to all the sons of Israel there hath been light in their dwellings.'
2 Samuel 24:13
And Gad cometh in unto David, and declareth to him, and saith to him, 'Do seven years of famine come in to thee in thy land? or three months art thou fleeing before thine adversary -- and he pursuing thee? or are three days' pestilence in thy land? now, know and see what word I take back to Him sending me.'