Dream of Brigham Young and Temple Keys

Wilford Woodruff recorded that in 1887 — two nights in succession shortly before the death of President John Taylor — he dreamed of Brigham Young, who had died ten years earlier. In the dream, President Young appeared to him, gave him the keys of the temple, and told him to go and dedicate it. At the time, the Salt Lake Temple was still under construction after forty years of labor. When it was completed, President Woodruff — then President of the Church — dedicated the Salt Lake Temple on April 6, 1893, recognizing the dedication as the fulfillment of the charge Brigham Young had given him in that prophetic dream years before.

Fuller account of this event (from LaRene Gaunt, "The Power of God Was with Us," Ensign, Mar. 1993, 28–31):

After talks by all three members of the First Presidency, President Wilford Woodruff knelt on a "plush, covered stool" and offered the dedicatory prayer. "He offered the prayer seemingly with [the] strength of a man fifty years old," wrote David John of the 86-year-old prophet, who read the 35-minute dedicatory prayer "unhesitatingly without glasses." Nearly fifty years earlier, President Woodruff had dreamed that Brigham Young gave him the keys of the temple and told him to go and dedicate it. This event was the fulfillment of that dream.