NET

18 A third of humanity was killed by these three plagues, that is, by the fire, the smoke, and the sulfur that came out of their mouths.

Darby

18 By these three plagues were the third part of men^D9538 killed, by the fire and the smoke and the brimstone which goes out of their mouths.

Darby Bible Notes

men - Or 'of the men.'

KJV

18 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.

Strong's

18 By ^G5259 these^G5130 three^G5140 was^G615 the third part^G5154 of men^G444 killed^G615, by^G1537 the fire^G4442, and^G2532 by^G1537 the smoke^G2586, and^G2532 by^G1537 the brimstone^G2303, which^G3588 issued^G1607 out of^G1537 their^G846 mouths^G4750.