At that time:

As Jesus passed by, he saw a man blind from birth. He spat on the ground and made mud with the saliva. Then he anointed the man’s eyes with the mud and said to him, ‘Go, wash in the pool of Siloam’ (which means Sent). So he went and washed and came back seeing. The neighbours and those who had seen him before as a beggar were saying, ‘Is this not the man who used to sit and beg?’ Some said, ‘It is he.’ Others said, ‘No, but he is like him.’ He kept saying, ‘I am the man.’

They brought to the Pharisees the man who had formerly been blind. Now it was a Sabbath day when Jesus made the mud and opened his eyes. So the Pharisees again asked him how he had received his sight. And he said to them, ‘He put mud on my eyes, and I washed, and I see.’ Some of the Pharisees said, ‘This man is not from God, for he does not keep the Sabbath.’ But others said, ‘How can a man who is a sinner do such signs?’ And there was a division among them.

So they said again to the blind man, ‘What do you say about him, since he has opened your eyes?’ He said, ‘He is a prophet.’ They answered him, ‘You were born in utter sin, and would you teach us?’ And they cast him out.

Jesus heard that they had cast him out, and having found him he said, ‘Do you believe in the Son of Man?’ He answered, ‘And who is he, sir, that I may believe in him?’ Jesus said to him, ‘You have seen him, and it is he who is speaking to you.’

He said, ‘Lord, I believe’, and he worshipped him.

John 9:1, 6-9, 13-17, 34-38