Revelation 16:13-16

13And I saw out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet, three unclean spirits, as frogs;

14for they are [the] spirits of demons, doing signs; which go out to the kings of the whole habitable world to gather them together to the war of [that] great day of 1God the Almighty.

15(Behold, I come as a thief. Blessed [is] he that watches and keeps his garments, that he may not walk naked, and that they [may not] see his shame.)

16And he gathered them together to the place called in Hebrew, Armagedon.