A Commentary of the Hadeeth: "You are unto me as Haaroon was unto Moosaa."
On the authrority of Sa'd Ibn Abi Waqqaas رضي الله عنه, that the Messenger of Allaah صلى الله عليه وسلم said to 'Ali Ibn Abi Taalib رضي الله عنه: "You are unto me as Haaroon was unto Moosaa, except that there will be no Prophet after me." [1]
The narration of Ahmad on the authority of Sa'eed Ibn al-Musayyib has it that 'Ali رضي الله عنه replied: "I am content, I am content!"
Ibn Sa'd narrates essentially the same story on the authority of al-Baraa' رضي الله عنه and Zayd Ibn Arqam رضي الله عنه, who reported that 'Ali's رضي الله عنه reply was, "Indeed, O Messenger of Allaah,' to which the Prophet صلى الله عليه وسلم said, "It is indeed so."