In Context

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;

18 by these three were the third of men killed, from the fire, and from the smoke, and from the brimstone, that is proceeding out of their mouth,

19 for their authorities are in their mouth, and in their tails, for their tails are like serpents, having heads, and with them they do injure;

20 and the rest of men, who were not killed in these plagues, neither did reform from the works of their hands, that they may not bow before the demons, and idols, those of gold, and those of silver, and those of brass, and those of stone, and those of wood, that are neither able to see, nor to hear, nor to walk,

21 yea they did not reform from their murders, nor from their sorceries, nor from their whoredoms, nor from their thefts.

Revelation 9:19 in Other Translations