2 Nephi 3

A contemporary to Lehi, Ezekiel writes that -

"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.
18 ¶ And when the children of thy people shall speak unto thee, saying, Wilt thou not shew us what thou meanest by these?
19 Say unto them, Thus saith the Lord GOD; Behold, I will take the stick of Joseph, which is in the hand of Ephraim, and the tribes of Israel his fellows, and will put them with him, even with the stick of Judah, and make them one stick, and they shall be one in mine hand.
20 ¶ And the sticks whereon thou writest shall be in thine hand before their eyes." (Old Testament Ezekiel 37:15 - 20)

It appears Ezekiel had received this revelation after the destruction of Jerusalem. About the same time, Lehi relates a prophecy that was given to Joseph, son of Jacob, to his own son, Joseph -

"...the fruit of thy loins shall write; and the fruit of the loins of Judah shall write; and that which shall be written by the fruit of thy loins, and also that which shall be written by the fruit of the loins of Judah, shall grow together, unto the confounding of false doctrines and laying down of contentions, and establishing peace among the fruit of thy loins, and bringing them to the knowledge of their fathers in the latter days, and also to the knowledge of my covenants, saith the Lord." (Book of Mormon 2 Nephi 3:12)

What is interesting in this prophecy is the emphasis that these two writings shall "grow together" suggesting that the confounding of false doctrines will not be immediate but it will be to one that studies these two works a "growing" of understanding as each work will teach the meaning of the other. That is why Lehi relates for -

"...out of weakness he shall be made strong, in that day when my work shall commence among all my people, unto the restoring thee, O house of Israel, saith the Lord." (Book of Mormon 2 Nephi 3:13)

Elder Boyd K. Packer said -

“The stick or record of Judah—The Old Testament and the New Testament—and the stick or record of Ephraim—The Book of Mormon, which is another testament of Jesus Christ—are now woven together in such a way that as you pore over one you are drawn to the other; as you learn from one you are enlightened by the other. They are indeed one in our hands. Ezekiel’s prophecy now stands fulfilled” (in Conference Report, Oct. 1982, p. 75; or Ensign, Nov. 1982, p. 53).