Read John 1:19-34:
This was John’s testimony when the Jewish leaders sent priests and Temple assistants from Jerusalem to ask John, “Who are you?” 20 He came right out and said, “I am not the Messiah.”
21 “Well then, who are you?” they asked. “Are you Elijah?”
“No,” he replied.
“Are you the Prophet we are expecting?”
22 “Then who are you? We need an answer for those who sent us. What do you have to say about yourself?”
23 John replied in the words of the prophet Isaiah:
“I am a voice shouting in the wilderness,
‘Clear the way for the Lord’s coming!’”
24 Then the Pharisees who had been sent 25 asked him, “If you aren’t the Messiah or Elijah or the Prophet, what right do you have to baptize?”
26 John told them, “I baptize with water, but right here in the crowd is someone you do not recognize. 27 Though his ministry follows mine, I’m not even worthy to be his slave and untie the straps of his sandal.”
28 This encounter took place in Bethany, an area east of the Jordan River, where John was baptizing.
29 The next day John saw Jesus coming toward him and said, “Look! The Lamb of God who takes away the sin of the world! 30 He is the one I was talking about when I said, ‘A man is coming after me who is far greater than I am, for he existed long before me.’ 31 I did not recognize him as the Messiah, but I have been baptizing with water so that he might be revealed to Israel.”
32 Then John testified, “I saw the Holy Spirit descending like a dove from heaven and resting upon him. 33 I didn’t know he was the one, but when God sent me to baptize with water, he told me, ‘The one on whom you see the Spirit descend and rest is the one who will baptize with the Holy Spirit.’ 34 I saw this happen to Jesus, so I testify that he is the Chosen One of God.”