The Book of Mormon, 2 Nephi 30:4-6
4 And then shall the remnant of our seed know concerning us, how that we came out from Jerusalem, and that they are descendants of the Jews.
5 And the gospel of Jesus Christ shall be declared among them; wherefore, they shall be restored unto the knowledge of their fathers, and also to the knowledge of Jesus Christ, which was had among their fathers.
6 And then shall they rejoice; for they shall know that it is a blessing unto them from the hand of God; and their scales of darkness shall begin to fall from their eyes; and many generations shall not pass away among them, save they shall be a pure and a delightsome people.
The Book of Mormon, 3 Nephi 20:15-19
15 And I say unto you, that if the Gentiles do not repent after the blessing which they shall receive, after they have scattered my people—
16 Then shall ye, who are a remnant of the house of Jacob, go forth among them; and ye shall be in the midst of them who shall be many; and ye shall be among them as a lion among the beasts of the forest, and as a young lion among the flocks of sheep, who, if he goeth through both treadeth down and teareth in pieces, and none can deliver.
17 Thy hand shall be lifted up upon thine adversaries, and all thine enemies shall be cut off.
18 And I will gather my people together as a man gathereth his sheaves into the floor.
19 For I will make my people with whom the Father hath covenanted, yea, I will make thy horn iron, and I will make thy hoofs brass. And thou shalt beat in pieces many people; and I will consecrate their gain unto the Lord, and their substance unto the Lord of the whole earth. And behold, I am he who doeth it.
The Book of Mormon, 3 Nephi 21:22-26
22 But if they will repent and hearken unto my words, and harden not their hearts, I will establish my church among them, and they shall come in unto the covenant and be numbered among this the remnant of Jacob, unto whom I have given this land for their inheritance;
23 And they shall assist my people, the remnant of Jacob, and also as many of the house of Israel as shall come, that they may build a city, which shall be called the New Jerusalem.
24 And then shall they assist my people that they may be gathered in, who are scattered upon all the face of the land, in unto the New Jerusalem.
25 And then shall the power of heaven come down among them; and I also will be in the midst.
26 And then shall the work of the Father commence at that day, even when this gospel shall be preached among the remnant of this people. Verily I say unto you, at that day shall the work of the Father commence among all the dispersed of my people, yea, even the tribes which have been lost, which the Father hath led away out of Jerusalem.
The Doctrine and Covenants, Section 109:65
65 And cause that the remnants of Jacob, who have been cursed and smitten because of their transgression, be converted from their wild and savage condition to the fulness of the everlasting gospel;
The Doctrine and Covenants, Section 3:18-20
18 And this testimony shall come to the knowledge of the Lamanites, and the Lemuelites, and the Ishmaelites, who dwindled in unbelief because of the iniquity of their fathers, whom the Lord has suffered to destroy their brethren the Nephites, because of their iniquities and their abominations.
19 And for this very purpose are these plates preserved, which contain these records–that the promises of the Lord might be fulfilled, which he made to his people;
20 And that the Lamanites might come to the knowledge of their fathers, and that they might know the promises of the Lord, and that they may believe the gospel and rely upon the merits of Jesus Christ, and be glorified through faith in his name, and that through their repentance they might be saved. Amen.
The Doctrine and Covenants, Section 49:24-25
24 But before the great day of the Lord shall come, Jacob shall flourish in the wilderness, and the Lamanites shall blossom as the rose.
25 Zion shall flourish upon the hills and rejoice upon the mountains, and shall be assembled together unto the place which I have appointed.
The Doctrine and Covenants, Section 87:5
5 And it shall come to pass also that the remnants who are left of the land will marshal themselves, and shall become exceedingly angry, and shall vex the Gentiles with a sore vexation.
Journal of Discourses, Orson Pratt 14:44
These Lamanites, these American Indians, will come to the knowledge of the covenant, and they will arise and will build upon the face of this land a magnificent city called Jerusalem after the pattern and in the same manner that the Jews will build old Jerusalem. That is what the Lamanites will do, and we will go and help them too, for it is predicted in the Book of Mormon that when this work should come forth, when the time fully arrives for the redemption of this small remnant of the house of Joseph, “As many of the Gentiles as will believe, they shall assist my people, who are a remnant of the house of Israel, that they may build up on the face of this land a city that shall be called the New Jerusalem, and then, behold, the powers of heaven shall come down and be in the midst of this people, and I also will be in your midst.” That is what the Lord intends to fulfil on this land. Jesus is coming here as well as to many other places. When the New Jerusalem is built on this land, Jesus will visit that city. His glory will be upon its dwelling places. Isaiah the Prophet has declared that upon every dwelling place of Mount Zion there shall be a cloud and smoke by day, and a shining, flaming fire by night. This will not only be on the New Jerusalem, but on the Holy City that is built up on the land of Palestine; and when the people have repented and become sufficiently righteous, and made preparation for the coming of the Lord Jesus, he will come, and they will behold the Shepherd that is promised to them.
Journal of Discourses, Orson Pratt 3:3
Zion must be redeemed before that day; the temple must be built upon the consecrated spot, the cloud and glory of the Lord rest upon it, and the Lamanites, many of them, brought in, and they must build up the NEW JERUSALEM! It is true, so says the Book of Mormon, that inasmuch as the Gentiles receive the Gospel, they shall assist my people the remnant of Jacob, saith the Lord, to build the New Jerusalem. And when they have got it built, then we are told that they shall assist my people who are of Jacob to be gathered in unto the New Jerusalem.
Journal of Discourses, Wilford Woodruff 15:35
The Lamanites will blossom as the rose on the mountains. I am willing to say here that, though I believe this, when I see the power of the nation destroying them from the face of the earth, the fulfillment of that prophecy is perhaps harder for me to believe than any revelation of God that I ever read. It looks as though there would not be enough left to receive the Gospel; but notwithstanding this dark picture, every word that God has ever said of them will have its fulfillment, and they, by and by, will receive the Gospel. It will be a day of God’s power among them, and a nation will be born in a day. Their chiefs will be filled with the power of God and receive the Gospel, and they will go forth and build the new Jerusalem, and we shall help them. They are branches of the house of Israel, and when the fullness of the Gentiles has come in and the work ceases among them, then it will go in power to the seed of Abraham.