1 Nephi 12:23, Book of Mormon: ¹

23 And it came to pass that I beheld, after they had dwindled in unbelief they became a dark, and loathsome, and a filthy people, full of idleness and all manner of abominations.

1 Nephi 13:15, Book of Mormon: ²

15 And I beheld the Spirit of the Lord, that it was upon the Gentiles, and they did prosper and obtain the land for their inheritance; and I beheld that they were white, and exceedingly fair and beautiful, like unto my people before they were slain.

2 Nephi 5:21-23, Book of Mormon: ³

21 And he had caused the cursing to come upon them, yea, even a sore cursing, because of their iniquity. For behold, they had hardened their hearts against him, that they had become like unto a flint; wherefore, as they were white, and exceedingly fair and delightsome, that they might not be enticing unto my people the Lord God did cause a skin of blackness to come upon them.

22 And thus saith the Lord God: I will cause that they shall be loathsome unto thy people, save they shall repent of their iniquities.

23 And cursed shall be the seed of him that mixeth with their seed; for they shall be cursed even with the same cursing. And the Lord spake it, and it was done.

2 Nephi 30:6, Book of Mormon (1830 Edition): ⁴

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 white and a delightsome people.

Jacob 3:5-9, Book of Mormon: ⁵

5 Behold, the Lamanites your brethren, whom ye hate because of their filthiness and the cursing which hath come upon their skins, are more righteous than you; for they have not forgotten the commandment of the Lord, which was given unto our father—that they should have save it were one wife, and concubines they should have none, and there should not be whoredoms committed among them.

6 And now, this commandment they observe to keep; wherefore, because of this observance, in keeping this commandment, the Lord God will not destroy them, but will be merciful unto them; and one day they shall become a blessed people.

7 Behold, their husbands love their wives, and their wives love their husbands; and their husbands and their wives love their children; and their unbelief and their hatred towards you is because of the iniquity of their fathers; wherefore, how much better are you than they, in the sight of your great Creator?

8 O my brethren, I fear that unless ye shall repent of your sins that their skins will be whiter than yours, when ye shall be brought with them before the throne of God.

9 Wherefore, a commandment I give unto you, which is the word of God, that ye revile no more against them because of the darkness of their skins; neither shall ye revile against them because of their filthiness; but ye shall remember your own filthiness, and remember that their filthiness came because of their fathers.

Alma 3:5-10, 14-17, Book of Mormon: ⁶

5 Now the heads of the Lamanites were shorn; and they were naked, save it were skin which was girded about their loins, and also their armor, which was girded about them, and their bows, and their arrows, and their stones, and their slings, and so forth.

6 And the skins of the Lamanites were dark, according to the mark which was set upon their fathers, which was a curse upon them because of their transgression and their rebellion against their brethren, who consisted of Nephi, Jacob, and Joseph, and Sam, who were just and holy men.

7 And their brethren sought to destroy them, therefore they were cursed; and the Lord God set a mark upon them, yea, upon Laman and Lemuel, and also the sons of Ishmael, and Ishmaelitish women.

8 And this was done that their seed might be distinguished from the seed of their brethren, that thereby the Lord God might preserve his people, that they might not mix and believe in incorrect traditions which would prove their destruction.

9 And it came to pass that whosoever did mingle his seed with that of the Lamanites did bring the same curse upon his seed.

10 Therefore, whosoever suffered himself to be led away by the Lamanites was called under that head, and there was a mark set upon him….

14 Thus the word of God is fulfilled, for these are the words which he said to Nephi: Behold, the Lamanites have I cursed, and I will set a mark on them that they and their seed may be separated from thee and thy seed, from this time henceforth and forever, except they repent of their wickedness and turn to me that I may have mercy upon them.

15 And again: I will set a mark upon him that mingleth his seed with thy brethren, that they may be cursed also.

16 And again: I will set a mark upon him that fighteth against thee and thy seed.

17 And again, I say he that departeth from thee shall no more be called thy seed; and I will bless thee, and whomsoever shall be called thy seed, henceforth and forever; and these were the promises of the Lord unto Nephi and to his seed.

3 Nephi 2:14-16, Book of Mormon: ⁷

14 And it came to pass that those Lamanites who had united with the Nephites were numbered among the Nephites;

15 And their curse was taken from them, and their skin became white like unto the Nephites;

16 And their young men and their daughters became exceedingly fair, and they were numbered among the Nephites, and were called Nephites.

Mormon 5:14-15, Book of Mormon: ⁸

14 And behold, they shall go unto the unbelieving of the Jews; and for this intent shall they go—that they may be persuaded that Jesus is the Christ, the Son of the living God; that the Father may bring about, through his most Beloved, his great and eternal purpose, in restoring the Jews, or all the house of Israel, to the land of their inheritance, which the Lord their God hath given them, unto the fulfilling of his covenant;

15 And also that the seed of this people may more fully believe his gospel, which shall go forth unto them from the Gentiles; for this people shall be scattered, and shall become a dark, a filthy, and a loathsome people, beyond the description of that which ever hath been amongst us, yea, even that which hath been among the Lamanites, and this because of their unbelief and idolatry.

Mormon 9:6, Book of Mormon: ⁹

6 O then ye unbelieving, turn ye unto the Lord; cry mightily unto the Father in the name of Jesus, that perhaps ye may be found spotless, pure, fair, and white, having been cleansed by the blood of the Lamb, at that great and last day.

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Excerpt from the October 1960 LDS General Conference, Spencer W. Kimball: ¹⁰

“At one meeting a father and mother and their sixteen-year-old daughter were present, the little member girl—sixteen—sitting between the dark father and mother, and it was evident she was several shades lighter than her parents—on the same reservation, in the same hogan, subject to the same sun and wind and weather. There was the doctor in a Utah city who for two years had had an Indian boy in his home who stated that he was some shades lighter than the younger brother just coming into the program from the reservation. These young members of the Church are changing to whiteness and to delightsomeness. One white elder jokingly said that he and his companion were donating blood regularly to the hospital in the hope that the process might be accelerated.”