Revelation 9:17 YLT

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;

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;