Rev Revelation, chapter Revelation of Jesus Christ, chapter 19
An angel invited all flesh-eating birds to feast on the flesh of people who would be killed by the Rider on the white horse. When the beast and the false prophet gathered kings with their armies to fight against the Rider and his army, the beast and the false prophet were thrown into the lake of fire. The Rider killed rebellious people with his sword, and the birds gorged themselves on their flesh.
Revelation 19:17-21
The rider on the horse killed the rest of their armies just by speaking words, which were like [MTY] a sword that extended from his mouth. All those birds gorged themselves on the flesh of the people whom he had killed.