John 9:18-21

18The Jews did not believe that he had been blind and had received his sight, until they called the parents of the man who had received his sight 19and asked them, “Is this your son, who you say was born blind? How then does he now see?” 20His parents answered, “We know that this is our son and that he was born blind. 21But how he now sees we do not know, nor do we know who opened his eyes. Ask him; he is of age. He will speak for himself.”