In addition...
In addition, in the Musnad of Ahmad alone, it has been narrated through thirty-odd chains of narrators from the Noble Prophet (peace be upon him and his family) that the number of Imams (peace be upon them) is twelve, and in the S ahih of Muslim this point has been narrated through eight chains, and likewise in the remaining collections, S ahihs , Sunans (books of the sunnah), and books of the Ahl al-Sunnat, this topic has been referred to numerous times.
In Shi‘a books as well traditions have been narrated with hundreds of chains that the Imams will be twelve, all of which were narrated by well-known companions and followers ( tabi`in ) up to two centuries before the birth of the twelfth Imam Mahdi (may Allah hasten his return) (peace be upon him), and in reality this is counted as a type of prediction and information about the future.
In spite of all this, it was said that a tradition has been narrated from Sulaim that the Prophet (peace be upon him and his family) said to Amir al-Mu’minin (peace be upon him): “You and twelve people from your progeny are the true Imams.” The reality is that in the present text and the reliable texts that before our time were in the possession of the scholars, this tradition did not exist.
Moreover, there are many traditions in the book of Sulaim ibn Qays itself that explicitly mention the Imams and their names as twelve people, and have specified the names of those twelve personages from Amir al-Mu’minin (peace be upon him) to Imam Mahdi (may Allah hasten his return) (peace be upon him) in the same order in which the Shi‘a believe.
This book, written in the first century after the Hijra, is reliable and the sum of its material clearly establishes the truth of the Imami school, since it contains news about Imams who were not even born in that time. Firm signs and evidence indicates the correctness of this book. Now, if we suppose the book contains such a tradition, that tradition can be interpreted in light of other books of traditions.
That is, the intent of the tradition is to indicate the number of the Imams and that they are from the progeny of ‘Ali (peace be upon him), and since the majority – eleven out of twelve – of the Imams are from his progeny, it was explained in these words – which, it is likely, have not even been narrated in entirety.