Such hadith-reports are abundant. The main idea that runs through all of them suggests that the topic about the future coming of the Mahdi and Qa’im during the time of the Prophet (peace be upon him and his progeny) was well known. In fact the way these reports speak about the subject indicates that it was not something new which was being presented to the people. On the contrary they relate the signs and characteristics of the person who would emerge as the Mahdi as in the statement "the promised Mahdi will be among my descendants."
The following traditions reflect such a pattern in their presentation. It is reported from Ali bin Abi Talib who said:
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