John 1:21 YLT

¹⁹  And this is the testimony of John, when the Jews sent out of Jerusalem priests and Levites, that they might question him, 'Who art thou?'

²⁰  and he confessed and did not deny, and confessed -- 'I am not the Christ.'

²¹  And they questioned him, 'What then? Elijah art thou?' and he saith, 'I am not.' -- 'The prophet art thou?' and he answered, 'No.'

²²  They said then to him, 'Who art thou, that we may give an answer to those sending us? what dost thou say concerning thyself?'

²³  He said, 'I 'am' a voice of one crying in the wilderness: Make straight the way of the Lord, as said Isaiah the prophet.'