21 and the rest were killed with the sword of him who is sitting on the horse, which sword is proceeding out of his mouth, and all the birds were filled out of their flesh.
Revelation 19:21 Cross References - RYLT
Revelation 1:16
16 and having in his right hand seven stars, and out of his mouth a sharp two-edged sword is proceeding, and his countenance is as the sun shining in its might.
Revelation 17:16
16 and the ten horns that you did see upon the beast, these shall hate the whore, and shall make her desolate and naked, and shall eat her flesh, and shall burn her in fire,
Revelation 19:11-15
11 And I saw the heaven having been opened, and lo, a white horse, and he who is sitting upon it is called Faithful and True, and in righteousness does he judge and war,
12 and his eyes are as a flame of fire, and upon his head are many diadems -- having a name written that no one has known, except himself,
13 and he is arrayed with a garment covered with blood, and his name is called, The Word of God.
14 And the armies in the heaven were following him upon white horses, clothed in fine linen -- white and pure;
15 and out of his mouth does proceed a sharp sword, that with it he may smite the nations, and he shall rule them with a rod of iron, and he does tread the press of the wine of the wrath and the anger of God the Almighty,
Revelation 19:17-19
17 And I saw one messenger standing in the sun, and he cried, a great voice, saying to all the birds that are flying in mid-heaven, 'Come and be gathered together to the supper of the great God,
18 that you may eat flesh of kings, and flesh of chiefs of thousands, and flesh of strong men, and flesh of horses, and of those sitting on them, and the flesh of all -- freemen and servants -- both small and great.'
19 And I saw the beast, and the kings of the earth, and their armies, having been gathered together to make war with him who is sitting upon the horse, and with his army;