The Doctrine and Covenants -Doctrine and Covenants – Chapter 33 | Verse 1

Behold, I say unto you, my servants Ezra and Northrop, open ye your ears and hearken to the voice of the Lord your God, whose word is quick and powerful, sharper than a two-edged sword, to the dividing asunder of the joints and marrow, soul and spirit; and is a discerner of the thoughts and intents of the heart.