Revelation 9:16-19

16And the number of mounted troops was two hundred million; I heard their number.

17Now the horses and riders in my vision looked like this: The riders had breastplates the colors of fire, sapphire, and sulfur. The heads of the horses were like the heads of lions, and out of their mouths proceeded fire, smoke, and sulfur. 18A third of mankind was killed by the three plagues of fire, smoke, and sulfur that proceeded from their mouths. 19For the power of the horses was in their mouths and in their tails; indeed, their tails were like snakes, having heads with which to inflict harm.