Origen's Commentary on the Gospel of John: Book VI. 9John I. 22.

9. John I. 22. "They said therefore unto him, Who art thou? that we may give an answer to them that sent us. What sayest thou of thyself?" This speech of the emissaries amounts to the following: We had a surmise what you were and came to learn if it was so, but now we know that you are not that. It remains for us, therefore, to hear your account of yourself, so that we may report your answer to those who sent us.