'Double edged' in the Bible

Let the extolling of God [be] in their throat, and a double-edged sword in their hand,

For the word of God [is] living and active and sharper than any double-edged sword, and piercing as far as the division of soul and spirit, both joints and marrow, and able to judge the reflections and thoughts of the heart.

and [he] had in his right hand seven stars, and a sharp double-edged sword coming out of his mouth, and his face [was] like the sun shining in its strength.

"And to the angel of the church in Pergamum write: "This is what the one who has the sharp double-edged sword says: