They said to him, “Where is he?” He said, “I do not know.”
Such a wonderful event as the giving of sight to a man born blind could not but be the talk of the town, and many heeded it no more than they do other town-talk, that is but nine days' wonder; but here we are told what the neighbours said of it, for the confirmation of the matter of fact.
Commenting on John 9:8-12
Then they said unto him, where is he?.... For Christ had withdrawn himself and was gone; whether on account of the Jews, who he knew would be irritated by this miracle, or whether to avoid all popular applause and glory, which he sought not, is not certain; it may be on both accounts: this question, however, was put, not out of good will to Christ...
Where is he? - They had designed to seize and deliver him up to the Sanhedrin, as a violater of the law, because he had done this on the Sabbath day.