D&C 33

Again, the Lord teaches His doctrine or gospel saying -

"Yea, repent and be baptized, every one of you, for a remission of your sins; yea, be baptized even by water, and then cometh the baptism of fire and of the Holy Ghost.
12 Behold, verily, verily, I say unto you, this is my gospel; and remember that they shall have faith in me or they can in nowise be saved..."  (Doctrine and Covenants 33:11–12)

Of such, Elder Bruce R. McConkie wrote -

“Sins are remitted not in the waters of baptism, as we say in speaking figuratively, but when we receive the Holy Ghost. It is the Holy Spirit of God that erases carnality and brings us into a state of righteousness. We become clean when we actually receive the fellowship and companionship of the Holy Ghost. It is then that sin and dross and evil are burned out of our souls as though by fire. The baptism of the Holy Ghost is the baptism of fire” (A New Witness for the Articles of Faith [1985], 290).