I am Jesus Christ … the Father and the Son, Ether 3:14 (3:17–20).
14 Behold, I am he who was prepared from the foundation of the world to redeem my people. Behold, I am Jesus Christ. I am the Father and the Son. In me shall all mankind have life, and that eternally, even they who shall believe on my name; and they shall become my sons and my daughters.
17 And now, as I, Moroni, said I could not make a full account of these things which are written, therefore it sufficeth me to say that Jesus showed himself unto this man in the spirit, even after the manner and in the likeness of the same body even as he showedhimself unto the Nephites.
18 And he ministered unto him even as he ministered unto the Nephites; and all this, that this man might know that he was God, because of the many great works which the Lord had showed unto him.
19 And because of the knowledge of this man he could not be kept from beholding within the veil; and he saw the finger of Jesus, which, when he saw, he fell with fear; for he knew that it was the finger of the Lord; and he had faith no longer, for he knew, nothing doubting.
20 Wherefore, having this perfect knowledge of God, he could not be kept from within the veil; therefore he saw Jesus; and he did minister unto him.
in the name of Jesus Christ thou shalt serve him, D&C 59:5.
5 Wherefore, I give unto them a commandment, saying thus: Thou shalt love the Lord thy God with all thy heart, with all thy might, mind, and strength; and in the name of Jesus Christ thou shalt serve him.
mine Only Begotten Son … which is Jesus Christ, Moses 6:52.
52 And he also said unto him: If thou wilt turn unto me, and hearken unto my voice, and believe, and repent of all thy transgressions, and be baptized, even in water, in the name of mine Only Begotten Son, who is full of grace and truth, which is Jesus Christ, the only name which shall be given under heaven, whereby salvation shall come unto the children of men, ye shall receive the gift of the Holy Ghost, asking all things in his name, and whatsoever ye shall ask, it shall be given you.