Revelation 9:17 in the King James Version
And thus I saw the horses in the vision, and them that sat on them, having breastplates of fire, and of jacinth, and brimstone: and the heads of the horses were as the heads of lions; and out of their mouths issued fire and smoke and brimstone.
Context
16 The number of the armies of the horsemen was two hundred million. I heard the number of them.
17 Thus I saw the horses in the vision and those who sat on them, having breastplates of fiery red, hyacinth blue, and sulfur yellow; and the horses’ heads resembled lions’ heads. Out of their mouths proceed fire, smoke, and sulfur.
18 By these three plagues, one third of mankind was killed: by the fire, the smoke, and the sulfur, which proceeded out of their mouths.