It is mentioned in Wasa’il ul-Shia that Abu Muhammad Alji had two sons, one was pious and the other evil. Some Shias had paid him a sum to appoint a proxy for performing Hajj on behalf of Imam Hujjat Ibnul Hasan (a.s.). It was one of the acts of worship that Shias used to perform. So Abu Mahmūd gave the amount to his evil son and performed the Hajj with him. Abu Muhammad says that on the day of Arafah I saw a wheat-complexioned, well-dressed and handsome youth. He was engrossed in supplications and seeking forgiveness more than other people. When it was time for the people to move from Arafat to Mashar he came to me and said, “O Shaykh! Aren’t you ashamed of Allah?”
“Why?” I asked.
He said, “You are told to appoint a proxy for a person you knew well for performing Hajj, and you have entrusted it to a man who drinks and spends on evil deeds.”
Then he pointed to one of my eye and said,
“Do you not fear becoming blind in the eye?”
I was ashamed and when I recovered from the shock I tried to look for the youth but he had disappeared from the plains of Arafat. Forty days had not passed when the eye towards which he had pointed, become infected and I became blind.