'Two edged' in the Bible

Ehud made him a two-edged dagger of a span long, and girded it under his garment upon his right thigh;

Let the praises of God be in their mouth, and two-edged swords in their hands,

But at the last she is as bitter as wormwood, and as sharp as a two edged sword.

Prophesy, thou son of man, and smite thine hands together: make the sword two edged, yea make it three edged, that manslayer's sword, that sword of the great slaughter, which shall smite them even in their privy chambers:

for the word of God is quick, and mighty in operation, and sharper than any two edged sword: and entereth through, even unto the dividing asunder of the soul and the spirit and of the joints, and the marrow: and judgeth the thoughts and the intents of the heart.

And he had in his right hand seven stars. And out of his mouth went a sharp two edged sword. And his face shone even as the sun in his strength.