Revelation 16:14-16

Young's Literal Translation

¹⁴ for they are spirits of demons, doing signs -- which go forth unto the kings of the earth, and of the whole world, to bring them together to the battle of that great day of God the Almighty; --

¹⁵ `lo, I do come as a thief; happy [is] he who is watching, and keeping his garments, that he may not walk naked, and they may see his unseemliness,' --

¹⁶ and they did bring them together to the place that is called in Hebrew Armageddon.