Revelation 16:14

14 for they are demonic spirits, performing signs, who go abroad to the kings of the whole world, to assemble them for battle on the great day of God the Almighty.

Revelation 16:14 In-Context

12 The sixth angel poured his bowl on the great river Euphra'tes, and its water was dried up, to prepare the way for the kings from the east.
13 And I saw, issuing from the mouth of the dragon and from the mouth of the beast and from the mouth of the false prophet, three foul spirits like frogs;
14 for they are demonic spirits, performing signs, who go abroad to the kings of the whole world, to assemble them for battle on the great day of God the Almighty.
15 ("Lo, I am coming like a thief! Blessed is he who is awake, keeping his garments that he may not go naked and be seen exposed!")
16 And they assembled them at the place which is called in Hebrew Armaged'don.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.