“‘Behold, the days come, saith the Lord, that I will raise unto David a righteous Branch, and a King shall reign and prosper …’ (Jer. 23:3–6). That is to say, the King who shall reign personally upon the earth during the Millennium shall be the Branch who grew out of the house of David. He shall execute judgment and justice in all the earth because he is the Lord Jehovah, even him whom we call Christ. …
“That the Branch of David is Christ is perfectly clear. We shall now see that he is also called David, that he is a new David, an Eternal David, who shall reign forever on the throne of his ancient ancestor [see Jeremiah 30:8–9]” (Bruce R. McConkie, The Promised Messiah: The First Coming of Christ [1978], 193).
“Are we amiss in saying that the prophet here mentioned is Joseph Smith, to whom the priesthood came, who received the keys of the kingdom, and who raised the ensign for the gathering of the Lord’s people in our dispensation? And is he not also the ‘servant in the hands of Christ, who is partly a descendant of Jesse as well as of Ephraim, or of the house of Joseph, on whom there is laid much power’?” (Bruce R. McConkie, The Millennial Messiah: The Second Coming of the Son of Man [1982], 339–40).