Revelation 16:12
And the sixth poured out his phial upon the great river Euphrates, and the water of it was dried up, that the way of the kings from the east might be prepared.
Revelation 9:14
Saying to the sixth angel, who had the trumpet, Loose the four angels who are bound in the great river Euphrates.
Revelation 7:2
And I saw another angel ascending from the east, having the seal of the living God: and he cried with a loud voice to the four angels to whom it was given to hurt the earth and the sea,
Revelation 11:14
The second wo is past: behold the third wo cometh quickly.
Revelation 17:15
And he saith to me, The waters which thou sawest, where the whore sitteth, are people, and multitudes, and nations, and tongues.