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?"
John 1:22
Surrounding context
1:21 And they asked him, "What then? Are you Elijah?" He said, "I am not." "Are you the Prophet?" And he answered, "No."
1:22 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?"
1:23 He said: "I am "The voice of one crying in the wilderness: "Make straight the way of the LORD,"' as the prophet Isaiah said."