John 9:27

He answered them, "I just told you, but you would not listen. Why should I tell you again? Do you men want to become his disciples, too?"

"Tell us if you are the Christ [i.e., God's specially chosen one]." But He replied, "You would not believe me if I [did] tell you [who I am].

So, they said to him, "How was your sight restored, then?"

Treasury of Scripture Knowledge

He answered them, I have told you already, and ye did not hear: wherefore would ye hear it again? will ye also be his disciples?

So, they said to him, "How was your sight restored, then?"

"Tell us if you are the Christ [i.e., God's specially chosen one]." But He replied, "You would not believe me if I [did] tell you [who I am].