Revelation 16:12

The sixth angel poured out his bowl on the great river Euphrates, and its water was dried up, to prepare the way for the kings from the East.

Revelation 17:13

These have one purpose and they give their power and authority to the beast.

Revelation 19:19-21

And I saw the beast and the kings of the earth with their armies gathered to make war against him who sits on the horse and against his army.

Treasury of Scripture Knowledge

Summary

But tidings out of the east and out of the north shall trouble him: therefore he shall go forth with great fury to destroy, and utterly to make away many.

Bible References

East

Revelation 16:12
The sixth angel poured out his bowl on the great river Euphrates, and its water was dried up, to prepare the way for the kings from the East.
Revelation 17:13
These have one purpose and they give their power and authority to the beast.
Revelation 19:19
And I saw the beast and the kings of the earth with their armies gathered to make war against him who sits on the horse and against his army.