Revelation 16:12

And the sixth angel poured out his cup on the great river Euphrates; and its water was dried up, that the way of the kings of the east might be prepared.

Revelation 17:13

These have one mind, and will give their power and authority to the beast.

Revelation 19:19-21

And I saw the beast, and the kings of the earth, and their armies, assembled together to make war with him that sat on the horse, and with 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
And the sixth angel poured out his cup on the great river Euphrates; and its water was dried up, that the way of the kings of the east might be prepared.
Revelation 17:13
These have one mind, and will give their power and authority to the beast.
Revelation 19:19
And I saw the beast, and the kings of the earth, and their armies, assembled together to make war with him that sat on the horse, and with his army.