Parallel
Revelation 9:18
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
Ἀπὸ τῶν τριῶν πληγῶν τούτων ἀπεκτάνθησαν τὸ τρίτον τῶν ἀνθρώπων, ἀπὸ τοῦ πυρὸς καὶ τοῦ καπνοῦ καὶ τοῦ θείου τοῦ ἐκπορευομένου ἐκ τῶν στομάτων αὐτῶν.
A third of mankind was killed by the three plagues of fire, smoke, and sulfur that proceeded from their mouths.