'Two edged' in the Bible

Let the high praises of God be in their mouth, and a twoedged sword in their hand;

But her end is bitter as wormwood, sharp as a twoedged sword.

For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.

And he had in his right hand seven stars: and out of his mouth went a sharp twoedged sword: and his countenance was as the sun shineth in his strength.