Cross reference
John 9:15
15 So the Pharisees put more questions to him about how his eyes had been made open. And he said to them, He put earth on my eyes, and I had a wash and am able to see.
John 9:10-11
10 So they said to him, How then were your eyes made open?
11 His answer was: The man who is named Jesus put earth mixed with water on my eyes, and said to me, Go and make yourself clean in Siloam: so I went away and, after washing, am now able to see.
John 9:26-27
26 Then they said to him, What did he do to you? how did he give you the use of your eyes?
27 His answer was: I have said it before, but your ears were shut: why would you have me say it again? is it your desire to become his disciples?