Doctrine and Covenants 20:

11 Proving to the world that the holy scriptures are true, and that God does inspire men and call them to his holy work in this age and generation, as well as in generations of old;
12 Thereby showing that he is the same God yesterday, today, and forever. Amen.
13 Therefore, having so great witnesses, by them shall the world be judged, even as many as shall hereafter come to a knowledge of this work.
14 And those who receive it in faith, and work righteousness, shall receive a crown of eternal life;

35 And we know that these things are true and according to the revelations of John, neither adding to, nor diminishing from the prophecy of his book, the holy scriptures, or the revelations of God which shall come hereafter by the gift and power of the Holy Ghost, the voice of God, or the ministering of angels.
36 And the Lord God has spoken it; and honor, power and glory be rendered to his holy name, both now and ever. Amen.
37 And again, by way of commandment to the church concerning the manner of baptism÷All those who humble themselves before God, and desire to be baptized, and come forth with broken hearts and contrite spirits, and witness before the church that they have truly repented of all their sins, and are willing to take upon them the name of Jesus Christ, having a determination to serve him to the end, and truly manifest by their works that they have received of the Spirit of Christ unto the remission of their sins, shall be received by baptism into his church.