“Then said they unto him, Who art thou? that we may give an answer to them that sent us. What sayest thou of thyself?”
King James Version (KJV)
Joh 1:22,23 Who art thou? When the priests and Levites insisted that John should declare who he was, he quoted Isaiah, and said he was The voice of one crying in the wilderness. See Isa 40:3. See PNT "Mt 3:3". His work was preparation for the Lord.