Moroni 2

 Moroni shares the Lord's instruction to His priesthood leaders - 

"...Ye shall call on the Father in my name, in mighty prayer; and after ye have done this ye shall have power that to him upon whom ye shall lay your hands, ye shall give the Holy Ghost; and in my name shall ye give it, for thus do mine apostles."  (Moroni 2:2)

It is apparent that priesthood power comes through calling upon the Father in the name of His Son.