'Two edged' in the Bible

The exaltation of God is in their throat, And a two-edged sword in their hand.

for the reckoning of God is living, and working, and sharp above every two-edged sword, and piercing unto the dividing asunder both of soul and spirit, of joints also and marrow, and a discerner of thoughts and intents of the heart;

and having in his right hand seven stars, and out of his mouth a sharp two-edged sword is proceeding, and his countenance is as the sun shining in its might.

'And to the messenger of the assembly in Pergamos write: These things saith he who is having the sharp two-edged sword: