John 1:29-31

29 on the morrow John sees Jesus coming unto him, and said, "Lo, the Lamb of God, who is taking away the sin of the world;

30 this is he concerning whom I said, After me does come a man, who has come before me, because he was before me:

31 and I knew him not, but, that he might be manifested to Israel, because of this I came with the water baptizing.