Joseph Smith, and my father, Hyrum Smith, Brigham Young, John Taylor, Wilford Woodruff, and other choice spirits who were reserved to come forth in the fulness of times to take part in ... the building of the temples ... for the redemption of the dead, were also in the spirit world. 138:53

Trivia: In Section 41, God commanded the church to build a house for someone. Who was that person?