Revelation 9:18

One-third of mankind was killed by these three plagues: the fire, smoke, and sulphur that kept pouring out of their mouths.

Revelation 9:15

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

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.

Treasury of Scripture Knowledge

Summary

By these three was the third part of men killed, by the fire, and by the smoke, and by the brimstone, which issued out of their mouths.

The third

Bible References

The third

Revelation 9:15
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.