The next day John saw Jesus coming to him and said: "Behold the Lamb of God that taketh away the sins of the world.
The next day John saw Jesus coming to him and said: "Behold the Lamb of God that taketh away the sins of the world. This is he of whom I spoke, there cometh one after me, that is preferred before me, for he was before me, &c. and I saw him, and testify that this is the Son of God." (JHN 1:29-34)