Revelation 16:12-16

Then the sixth [angel] emptied his bowl on the mighty river Euphrates, and its water was dried up to make ready a road for [the coming of] the kings of the east (from the rising sun). [Isa. 11:15, 16.] And I saw three loathsome spirits like frogs, [leaping] from the mouth of the dragon and from the mouth of the beast and from the mouth of the false prophet. [Exod. 8:3; I Kings 22:21-23.] For really they are the spirits of demons that perform signs (wonders, miracles). And they go forth to the rulers and leaders all over the world, to gather them together for war on the great day of God the Almighty. Behold, I am going to come like a thief! Blessed (happy, to be envied) is he who stays awake (alert) and who guards his clothes, so that he may not be naked and [have the shame of being] seen exposed! And they gathered them together at the place which in Hebrew is called Armageddon. [II Kings 9:27.]