John 1: 29 - 34
29 The next day he saw Jesus coming toward him, and said, "Behold, the Lamb of God, who takes away the sin of the world!
30 This is he of whom I said, `After me comes a man who ranks before me, for he was before me.'
31 I myself did not know him; but for this I came baptizing with water, that he might be revealed to Israel."
32 And John bore witness, "I saw the Spirit descend as a dove from heaven, and it remained on him.
33 I myself did not know him; but he who sent me to baptize with water said to me, `He on whom you see the Spirit descend and remain, this is he who baptizes with the Holy Spirit.'
34 And I have seen and have borne witness that this is the Son of God."

EWTN