A third of mankind was killed by the three plagues of fire, smoke, and sulfur that proceeded from their mouths.
Berean Standard Bible (BSB)
By these three plagues were one third of mankind killed: by the fire, the smoke, and the sulfur, which proceeded out of their mouths.
World English Bible (WEB)
By{G5259} these{G5130} three{G5140} was{G615} the third part{G5154} of men{G444} killed{G615}{(G5681)}, by{G1537} the fire{G4442}, and{G2532} by{G1537} the smoke{G2586}, and{G2532} by{G1537} the brimstone{G2303}, which{G3588} issued{G1607}{(G5740)} out of{G1537} their{G846} mouths{G4750}.
Strong's King James
(18) A third of mankind was killed from these three plagues, from the fire, the smoke and the brimstone going out from their mouths.
The F.O.G
The F.O.G Message
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,
Young's Literal Translation