Aban says that Sulaym said: “I said to ibn Abbas: “Tell me what is the most important matter that you people have heard from Ali (AS)?”
Sulaym says: “He told me a matter that I had heard from Ali (AS). Alayhissalam said: “The Holy Prophet (SAW) called me at a time when he had a book in his hands. He said: “O Ali, keep this book.” I asked: “O Messenger of Allah, what is in the Book?” He replied: “This is that Book that Allah has written – it contains the names of the unfortunate people and names of the fortunate people in my Ummah until the Day of Judgment. My God has commanded me to give this Book to you.””