refer in this text to 2 Ne. 1:5
“The Lord gave this land upon which we dwell, America, as an everlasting possesssion to Joseph, the son of Jacob. His posterity, when cleansed from sin, and when they come forth in the resurrection, shall inherit this part of the earth. This land shall be theirs forever. The Lord gave this land also to others at an earlier date, the Jaredites, and they, too, who are righteous among them, shall possess it forever.” (Joseph Fielding Smith, Doctrines of Salvation, 1:88)
“By it, [the Book of Mormon] we learn that our western tribes of Indians are descendants from that Joseph who was sold into Egypt, and that the land of America is a promised land unto them… .” (Teachings of the Prophet Joseph Smith, p. 17)