Revelation 16:13-16

Then I saw three evil spirits that looked like frogs. They came out of the mouths of the dragon, the beast and the false prophet. They are spirits of demons that perform signs. They go out to gather the kings of the whole world for battle. This battle will take place on the great day of the God who rules over all. “Look! I am coming like a thief! Blessed is anyone who stays awake and keeps their clothes on. Then they will be ready. They will not be caught naked and so be put to shame.” Then the evil spirits gathered the kings together. In the Hebrew language, the place where the kings met is called Armageddon.