18 One-third of mankind was killed by these three plagues: the fire, smoke, and sulphur that kept pouring out of their mouths.
Revelation 9:18 Cross References - Williams
Revelation 9:15
15 Then the four angels that were kept in readiness for that hour and day and month and year were turned loose to kill one-third of mankind.
Revelation 9:17
17 In my vision the horses and the horsemen looked like this: Their breastplates were red, blue, and yellow; the horses' heads were like lions' heads, and fire, smoke, and sulphur kept pouring out of their mouths.