'Two edged' in the Bible

Let the exaltation of God be in their mouthsand a double-edged sword in their hands,

For the word of God is living and effective and sharper than any double-edged sword, penetrating as far as the separation of soul and spirit, joints and marrow. It is able to judge the ideas and thoughts of the heart.

He had seven stars in His right hand; a sharp double-edged sword came from His mouth, and His face was shining like the sun at midday.

“Write to the angel of the church in Pergamum:“The One who has the sharp, double-edged sword says: