Mosiah 18:15-16

15 And again, Alma took another, and went forth a second time into the water, and baptized him according to the first, only he did not bury himself again in the water.

16 And after this manner he did baptize every one that went forth to the place of Mormon; and they were in number about two hundred and four souls; yea, and they were baptized in the waters of Mormon, and were filled with the grace of God.

Moses 6:51-53 – Adam baptized

51 And he called upon our father Adam by his own voice, saying: I am God; I made the world, and men before they were in the flesh.

52 And he also said unto him: If thou wilt turn unto me, and hearken unto my voice, and believe, and repent of all thy transgressions, and be baptized, even in water, in the name of mine Only Begotten Son, who is full of grace and truth, which is Jesus Christ, the only name which shall be given under heaven, whereby salvation shall come unto the children of men, ye shall receive the gift of the Holy Ghost, asking all things in his name, and whatsoever ye shall ask, it shall be given you.

53 And our father Adam spake unto the Lord, and said: Why is it that men must repent and be baptized in water? And the Lord said unto Adam: Behold I have forgiven thee thy transgression in the Garden of Eden.