'With The Sword' in the Bible

Repent therefore, or else I will soon come to you and will fight against them with the sword of my mouth.

If anyone is destined for captivity, to captivity he goes; if anyone kills with the sword, with the sword he must be killed. Here is the endurance and faith of the saints.

And the rest were killed with the sword that came from the mouth of him who sat on the horse, and all the birds were gorged with their flesh.