101 Reasons Why I Believe Joseph Smith Was A Prophet
“... in thee (that is, in thy Priesthood) and in thy seed (that is, thy Priesthood), for I give unto thee a promise that this right shall continue in thee, and in thy seed after thee (that is to say, the literal seed, or the seed of the body) shall all the families of the earth be blessed, even with the blessings of the Gospel, which are the blessings of salvation, even of eternal life.”(2)
30) Abraham received promises concerning his seed, and of the fruit of his loins–from whose loins ye are, namely, my servant Joseph– which were to continue so long as they were in the world; and as touching Abraham and his seed, out of the world they should continue; both in the world and out of the world should they continue as innumerable as the stars; or, if ye were to count the sand upon the seashore ye could not number them. 31) This promise is yours also, because ye are of Abraham.... 32) Go ye, therefore, and do the works of Abraham....
5. Brigham Young said, "Joseph Smith, junior, was foreordained to come through the loins of Abraham, Isaac, Jacob, Joseph, and so on down through the Prophets and Apostles; and thus he came forth in the last days to be a minister of salvation, and to hold the keys of the last dispensation of the fulness of times." JD 7:290, discourse of 9 October 1859.