Revelation 9:16

And the number of the army of horsemen was two hundred millions: I heard their number.

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.

Treasury of Scripture Knowledge

Summary

And at the time of the end shall the king of the south push at him: and the king of the north shall come against him like a whirlwind, with chariots, and with horsemen, and with many ships; and he shall enter into the countries, and shall overflow and pass over.

Bible References

With horsemen

Revelation 9:16
And the number of the army of horsemen was two hundred millions: I heard their number.
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.