'Two edged' in the Bible

Let the high praises of God be in their mouth, and a two-edged sword in their hand:

but her end is bitter as wormwood, sharp as a two-edged sword.

For the word of God is living and operative, and sharper than any two-edged sword, and penetrating to the division of soul and spirit, both of joints and marrow, and a discerner of the thoughts and intents of the heart.

and having in his right hand seven stars; and out of his mouth a sharp two-edged sword going forth; and his countenance as the sun shines in its power.

And to the angel of the assembly in Pergamos write: These things says he that has the sharp two-edged sword:

And out of his mouth goes a sharp two-edged sword, that with it he might smite the nations; and he shall shepherd them with an iron rod; and he treads the wine-press of the fury of the wrath of God the Almighty.