Charles Ellicott Commentary Revelation 14:19-20

"And the angel cast his sickle into the earth, and gathered the vintage of the earth, and cast it into the winepress, the great [winepress], of the wrath of God. And the winepress are trodden without the city, and there came out blood from the winepress, even unto the bridles of the horses, as far as a thousand and six hundred furlongs." — Revelation 14:19-20 (ASV)

And the angel . . .—The vine (that is, the vintage of the vine), when gathered, is cast into the winepress of the wrath of God, the great (winepress). And the winepress was trodden without the city, and there came forth blood out of the winepress as far as the bridles of the horses, from a thousand six hundred furlongs (stadii).

The outflow of the blood of the grapes pressed reached over a distance of sixteen hundred stadii. The treading of the winepress was a figure representing vengeance; the red juice of the grape strongly suggested the shedding of blood. (Compare to Isaiah 63:2-4.) The winepresses usually stood outside the city: it is so represented here, not without an allusion to those who fall under the weight of this judgment because they have refused the defense of the true city and sanctuary. (Compare to Revelation 14:1 and Psalm 132:17-18.)

The distance (sixteen hundred stadii), that is, four multiplied into itself and then multiplied by a hundred, is symbolical (such seems the most probable meaning) of a judgment complete and full, and reaching to all corners of the earth—"the whole world, of which Satan is called the prince, is judged, and condemned, and punished." (Dr. Currey). In the vintage and harvest is a piercing discrimination between the faithful fruit-bearing children of the King and the cowardly or selfish, whose hearts are for self and not for Christ, but who yield themselves servants to sin.