15 Again, then, the Pharisees also began asking him how he saw again (= received his sight). Now he said to them, "He applied clay mud upon my eyes, and I washed myself, and now (or: the next thing), I am seeing."
John 9:15 Cross References - JMNT
John 9:10-11
10 Then they began saying to him, "How, then, were your eyes opened up?"
11 That man decidedly replied, "The Man called 'Jesus' made clay mud and anointed (smeared [it] on) my eyes, and said to me, 'Lead on under into the Siloam, and wash yourself.' And then, upon washing myself, I looked up and saw again."
John 9:26-27
26 So then they said to him [some MSS add: again], "What did he do to you? How did he open up your eyes?"
27 He decidedly answered them, "I told you already, and you folks did not listen (or: hear; = pay attention)! Why are you now wanting to hear [it] again? You are not wanting to become his disciples, also, are you?"