Isaiah 7:19-20

19They will all come in great crowds. They will come into the valleys, the cliffs, the holes in the rocks, the thorn bushes and the pools of water.

20At that time, the Lord will use the king of Assyria to bring trouble and pain. He will come from beyond the Euphrates river. He will be like a sharp knife that cuts off all your hair, the hair from your head, your legs and your beard.