'Two edged' in the Bible

and having in his right hand seven stars; and out of his mouth a sharp two-edged sword going forth; and his countenance as the sun shines in its power.

And to the angel of the assembly in Pergamos write: These things says he that has the sharp two-edged sword:

And out of his mouth goes a sharp two-edged sword, that with it he might smite the nations; and he shall shepherd them with an iron rod; and he treads the wine-press of the fury of the wrath of God the Almighty.