Doctrines of Salvation, Smith, 1:283
[Why no more doctrine?] “Because the people had refused to pray. Because they had hardened their hearts, even in his [Nephi’s] day. Therefore the Lord closed his mouth, and said, there shall be no more doctrine till Christ comes, so far as you are concerned, and I cannot say more, because the Lord won’t permit it… . Now that applies in our day. We have members of the Church to whom this ought to be read. (2 Ne. 32:6-7).” (Joseph Fielding Smith, Conference Report, Oct. 1919, pp. 145-146)