'Two edged' in the Bible

For the word of God is living, and effective, and sharper than any two-edged sword, and reaching even to the division of soul and spirit, and of joints and marrows, and distinguishes thoughts and intentions of mind;

and he had in his right hand seven stars, and out of his mouth proceeded a sharp two-edged sword, and his face shone like the sun in his strength.

And to the angel of the church in Pergamus write, These things says he that has the two-edged sharp sword,