Revelation 19:21

A Conservative Version

And the others were killed by the sword that comes forth out of his mouth (of him who sits upon the horse), and all the birds were filled from their flesh.

Cross References

Revelation 1:16

and having in his right hand seven stars, and a sharp two-edged sword coming out of his mouth. And the sight of him was as the sun shines in its strength.

Revelation 17:16

And the ten horns that thou saw, and the beast, these will hate the whore, and will make her desolate, and will make her naked, and will eat her flesh, and will burn her with fire.