'Double edged' in the Bible

Ehud forged a double-edged sword that was one cubit long, tied it to his right thigh under his cloak,

But in the end she is as bitter as wormwood, and as sharp as a double-edged sword.

For the word of God is living and active, sharper than any double-edged sword, piercing until it divides soul and spirit, joints and marrow, as it judges the thoughts and purposes of the heart.