Narrated from Shaikh Husain Ibn Abdul Karim Gharavi:
A blind man entered the holy shrine of Ameerul Momineen (a.s.), due to extreme age, his eyeballs had loosened in their sockets. After frequent supplications and numerous entreaties, he stood before the mausoleum and spoke in a not-too-polite-manner with Ameerul Momineen (a.s.).
Many a times, I thought of reprimanding him for such a manner of speech, but changed my mind at the last moment. This continued for some time.
One day, I heard a lot of commotion outside the shrine. I thought either some wheat had arrived from Baghdad or maybe somebody had been murdered. I came out to investigate and was told that the eyesight of a blind man had been restored. I thought to myself: I wish it’s the same blind old man. I moved forward to the courtyard of the shrine and found that it was indeed the same man. I thanked God.
My revered father has added a sentence to this incident. He says: When the blind man spoke to Imam (a.s.), he spoke in a manner as if someone was actually sitting before him. One of his harsh statements was thus: I come and go from your presence while those who are not among your friends get cured.
Furhatul Quraa, pg. 144. Biharul Anwaar, vol. 42, pg. 317, h. 4.