And then came Jesus from Galilee to Jordan, unto John, to be baptized of him. But John refused him, saying, I have need to be baptized of you, and why do you come to me? And Jesus, answering, said unto him, Suffer me to be baptized of you, for thus it becomes us to fulfill all righteousness. Then he suffered him. And John went down into the water and baptized him. And Jesus, when he was baptized, went up immediately out of the water. And John saw, and behold, the Heavens were opened unto him. And he saw the spirit of God descending like a dove and lighting upon Jesus. And behold, he heard a voice from Heaven saying, You are my Son; this day I have begotten you.
Source: Matthew 2:4

And it came to pass in those days that Jesus came from Nazareth of Galilee and was baptized of John in Jordan. And immediately coming up out of the water, he saw the Heavens opened and the spirit like a dove descending upon him. And there came a voice from Heaven, saying, You are my Son; this day I have begotten you. And John bore record of it.
Source: Mark 1:2

John answered them, saying, I baptize with water, but there stands one among you whom you know not. He it is of whom I bear record. He is that Prophet, even Elias, who, coming after me, is preferred before me, whose shoe’s latchet I am not worthy to untie, or whose place I am not able to fill. For he shall baptize not only with water, but with fire, and with the holy ghost.
The next day, John sees Jesus coming unto him, and said, Behold the Lamb of God who takes away the sin of the world. And John bore record of him unto the people, saying, This is he of whom I said, After me comes a man who is preferred before me, for he was before me, and I knew him, and that he should be made manifest to Israel. Therefore have I come baptizing with water. And John bore record, saying, When he was baptized of me, I saw the spirit descending from Heaven like a dove, and it abided upon him. And I knew him, for he who sent me to baptize with water, the same said unto me, Upon whom you shall see the spirit descending and remaining on him, the same is he who baptizes with the holy ghost. And I saw and bore record that this is the Son of God. These things were done in Bethabara beyond Jordan, where John was baptizing.
Source: John 1:4-5

And he spake also concerning a prophet who should come before the Messiah to prepare the way of the Lord. Yea, even he should go forth and cry in the wilderness, Prepare ye the way of the Lord and make his paths straight! For there standeth one among you whom ye know not; and he is mightier than I, whose shoe’s latchet I am not worthy to unloose. And much spake my father concerning this thing. And my father said he should baptize in Bethabara beyond Jordan; and he also said he should baptize with water, even that he should baptize the Messiah with water. And after he had baptized the Messiah with water, he should behold and bear record that he had baptized the Lamb of God, who should take away the sins of the world.
Source: 1 Nephi 3:3

And now, if the Lamb of God, he being holy, should have need to be baptized by water to fulfill all righteousness, oh, then, how much more need have we, being unholy, to be baptized, yea, even by water? And now I would ask of you, my beloved brethren, wherein the Lamb of God did fulfill all righteousness in being baptized by water? Know ye not that he was holy? But notwithstanding he being holy, he sheweth unto the children of men that according to the flesh he humbleth himself before the Father, and witnesseth unto the Father that he would be obedient unto him in keeping his commandments. Wherefore, after he was baptized with water, the holy ghost descended upon him in the form of a dove. And again, it sheweth unto the children of men the straitness of the path and the narrowness of the gate by which they should enter, he having set the example before them. And he said unto the children of men, Follow thou me. Wherefore, my beloved brethren, can we follow Jesus save we shall be willing to keep the commandments of the Father? And the Father said, Repent ye, repent ye, and be baptized in the name of my Beloved Son. And also the voice of the Son came unto me, saying, He that is baptized in my name, to him will the Father give the holy ghost like unto me. Wherefore, follow me and do the things which ye have seen me do.
Source: 2Nephi 13:2