John 1:29-36
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29On the morrow he seeth Jesus coming unto him, and saith, Behold, the Lamb of God, that taketh away the sin of the world! 30This is he of whom I said, After me cometh a man who is become before me: for he was before me. 31And I knew him not; but that he should be made manifest to Israel, for this cause came I baptizing in water. 32And John bare witness, saying, I have beheld the Spirit descending as a dove out of heaven; and it abode upon him. 33And I knew him not: but he that sent me to baptize in water, he said unto me, Upon whomsoever thou shalt see the Spirit descending, and abiding upon him, the same is he that baptizeth in the Holy Spirit. 34And I have seen, and have borne witness that this is the Son of God.
35Again on the morrow John was standing, and two of his disciples; 36and he looked upon Jesus as he walked, and saith, Behold, the Lamb of God!
John 1:29-36 (ASV)