'Two edged' in the Bible

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.

And to the agent of the congregation in Pergamos write, These things says he who has the sharp two-edged sword:

And a sharp two-edged sword comes out of his mouth, so that he would smite the nations by it. And he will tend them with a rod of iron. And he treads the winepress of the wine of the wrath of the anger of the Almighty God.