Moses 7:8, 22 in the current 2013 edition of the Book of Moses.
Moses 7:8, 22, The Pearl of Great Price, The Church of Jesus Christ of Latter-day Saints, accessed February 27, 2023
8 For behold, the Lord shall curse the land with much heat, and the barrenness thereof shall go forth forever; and there was a blackness came upon all the children of Canaan, that they were despised among all people.
. . .
22 And Enoch also beheld the residue of the people which were the sons of Adam; and they were a mixture of all the seed of Adam save it was the seed of Cain, for the seed of Cain were black, and had not place among them.