John 1:7, 19-23, 35-37

This man came for a witness, to bear witness of the Light, that all through him might believe.

Now this is the testimony of John, when the Jews sent priests and Levites from Jerusalem to ask him, “Who are you?” He confessed, and did not deny, but confessed, “I am not the Christ.” And they asked him, “What then? Are you Elijah?” He said, “I am not.” “Are you the Prophet?” And he answered, “No.” Then they said to him, “Who are you, that we may give an answer to those who sent us? What do you say about yourself?” He said: “I am ‘The voice of one crying in the wilderness: “Make straight the way of the LORD,” ’ as the prophet Isaiah said.”

Again, the next day, John stood with two of his disciples. And looking at Jesus as He walked, he said, “Behold the Lamb of God!” The two disciples heard him speak, and they followed Jesus.