“The Remnant of Our Seed… Are Descendants of the Jews”

Joseph F. McConkie, Robert L. Millet
The idea that the Lamanites are a remnant of the Jews is affirmed in a revelation given to Joseph Smith (D&C 19:27). The expression, however, has reference to the fact that their forefathers were citizens of the Manasseh of Judah, not that they are of that tribe (see 2 Nephi 33:8). Lehi was a descendant of Manasseh (Alma 10:3), Ishmael of Ephraim (JD 23:184). The Book of Mormon is the record of Joseph (2 Nephi 3:12) or the “stick of Ephraim” (D&C 27:5).

Doctrinal Commentary on the Book of Mormon, Vol. 1