And he hath seen in a vision ... - When this was shown to Saul, or how, is not recorded. The vision was shown to Saul to assure him when Ananias came that he was no impostor. He was thus prepared to receive consolation from this disciple. He was even apprised of his name, that he might be the more confirmed.
Related Commentaries of Acts 9:12
Acts 9:12
12 And hath seen in a vision a man named Ananias coming in, and putting his hand on him, that he might receive his sight.