'Double edged' in the Bible

For the message of God is a living and active force, sharper than any double-edged sword, piercing through soul and spirit, and joints and marrow, and keen in judging the thoughts and purposes of the mind.

In his right hand he held seven stars; from his mouth came a sharp double-edged sword, and his face shone like the sun at noonday.

"To the angel of the church in Pergamum write: " 'He who wields the sharp, double-edged sword speaks thus: