Two Sticks

The prophet Ezekiel (Ezekiel 37:15-28) prophesied that in the latter-days two sticks (scriptures) would be brought together and they would become one.  These two scriptures would serve to gather Israel in the latter-days.

 
15  The word of the LORD came again unto me, saying,

16 Moreover, thou son of man, take thee one stick, and write upon it, For Judah, and for the children of Israel his companions: then take another stick, and write upon it, For Joseph, the stick of Ephraim, and for all the house of Israel his companions:

17 And join them one to another into one stick; and they shall become one in thine hand.

This promise has literally been fulfilled in joining the Bible and the Book of Mormon as witnesses of the divinity of Jesus Christ. 

Wilford Woodruff, prophet and president of the Church of Jesus Christ of Latter-day Saints from 1890-1898, said about the relationship of the Bible and Book of Mormon:

"Does the Book of Mormon contain a different gospel to that contained in the Bible? It does not. It gives a history of the people who dwelt upon [the American] continent anciently, tells where they came from and how they came here, tells of the dealings of God with them, and the establishment of the Church of Christ among them. They were visited by Jesus after His resurrection. Hence He said "Other sheep I have, which are not of this fold: them also I must bring and they shall hear my voice; and there shall be one fold and one shepherd." [John 10:16.] … Both books contain the same gospel. There was never but one gospel and there never will be any other revealed to the human family" (Deseret News: Semi-Weekly, August 16, 1881 published in Teachings of the Presidents of the Church: Wilford Woodruff, 2004).