Revelation 19:21

King James 2000

And the rest were slain with the sword of him that sat upon the horse, which sword proceeded out of his mouth: and all the fowls were filled with their flesh.

Cross References

Revelation 1:16

And he had in his right hand seven stars: and out of his mouth went a sharp two edged sword: and his countenance was as the sun shines in its strength.

Revelation 17:16

And the ten horns which you saw upon the beast, these shall hate the harlot, and shall make her desolate and naked, and shall eat her flesh, and burn her with fire.