'Two edged' in the Bible

Let the high praises of God be in their mouth, And a two-edged sword in their hand;

But in the end she is bitter as wormwood, Sharp as a two-edged sword.

For the word of God is living, and active, and sharper than any two-edged sword, and piercing even to the dividing of soul and spirit, of both joints and marrow, and quick to discern the thoughts and intents of the heart.

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

and to the angel of the church in Pergamum write: These things saith he that hath the sharp two-edged sword: