John the Apostle
Revelation 19:15BSB·traditional attribution

And from His mouth proceeds a sharp sword with which to strike down the nations, and He will rule them with an iron scepter. He treads the winepress of the fury of the wrath of God the Almighty.

Matthew Henry Presbyterian @wholebiblehenry

No sooner was the marriage solemnized between Christ and his church by the conversion of the Jews than the glorious head and husband of the church is called out to a new expedition, which seems to be the great battle that was to be fought at Armageddon, foretold Rev 16:16. And here observe, I. The description of the great Commander, 1.

Commenting on Revelation 19:11-21

John Gill Reformed Baptist @doctorgill

And out of his mouth goeth a sharp sword,.... The Complutensian edition, and all the Oriental versions, with the Vulture Latin, read, "a sharp twoedged sword". The word of God, or the judiciary sentence of Christ according to it, and which he will fully execute, to the utter destruction of all his enemies; See Gill on Rev 1:16 that with it he should smite the...

Albert Barnes Presbyterian @notesbybarnes

Verse 15. And out of his mouth goeth a sharp sword. . In that place the sword seems to be an emblem of his words or doctrines, as penetrating the hearts of men; here it is the emblem of a work of destruction wrought on his foes. That with it he should smite the nations.