Revelation 16:12
And the sixth angel poured out his vase upon the great river Euphrates; and the water thereof was dried up, that the way of the kings who come from the rising of the sun might be prepared.
Revelation 9:14
saying to the sixth angel who held the trumpet, Loose the four angels which are bound at the great river Euphrates.
Revelation 7:2
And I saw another angel ascending from the rising of the sun, having the seal of the living God; and he cried with a loud voice to the four angels to whom power was given for them to hurt the earth and the sea,
Revelation 11:14
The second woe is past; behold the third woe is coming quickly.
Revelation 17:15
And he saith to me, The waters which thou sawest, on which the whore sat, are people, and multitudes, and nations, and tongues.