Rev Revelation, chapter Revelation of Jesus Christ, chapter 9
And thus I saw the horses in the vision, and them that sat on them, having breastplates of fire, and of jacinth, and sulfur: and the heads of the horses [were] as the heads of lions; and out of their mouths issued fire and smoke and sulfur.
By these three was the third part of men killed, by the fire, and by the smoke, and by the sulfur, which issued out of their mouths.