Revelation 9:14

11 and they have over them a king -- the messenger of the abyss -- a name [is] to him in Hebrew, Abaddon, and in the Greek he hath a name, Apollyon.

12 The first wo did go forth, lo, there come yet two woes after these things.

13 And the sixth messenger did sound, and I heard a voice out of the four horns of the altar of gold that is before God,

14 saying to the sixth messenger who had the trumpet, `Loose the four messengers who are bound at the great river Euphrates;`

15 and loosed were the four messengers, who have been made ready for the hour, and day, and month, and year, that they may kill the third of men;

16 and the number of the forces of the horsemen [is] two myriads of myriads, and I heard the number of them.

17 And thus I saw the horses in the vision, and those sitting upon them, having breastplates of fire, and jacinth, and brimstone; and the heads of the horses [are] as heads of lions, and out of their mouths proceedeth fire, and smoke, and brimstone;