Imam Sadiq (as) says:
In the Shrine of Allah Almighty, I was sitting beside the position of prophet Abraham that an old man came who had spent his whole life committing sins, he looked at me and said:
نِعْمَ الشَّفيعُ اِلَى اللّهِ لِلْمُذْنِبينَ .
You are a good intercessor before Allah for those who have sinned.
Then he took the curtain of the Kabah and whispered some poems that meant like:
O Merciful Allah, due to my ancestor the sixth Imam, because of the Holy Quran, due to Imam Ali, due to Imam Hasan and Imam Hosein, due to Hazrat Zahra, due to the Imams, due to Imam Mahdi forgive the errors and sins of your servant.
A harbinger was heard to have said: O old man! Although you had great sins but I forgave all due the sanctity of those whom you have sworn them to me, if you have asked the forgiveness of the sins of all people in the universe I would have done so except for the killer of camel of Hazrat Saleh and the murderers of prophets and Imams.
taken from the book by Hassan Ansarian
source : erfan.ir
