A brief body classified by the updated scientist: Abu Jaafar Ahmed bin Muhammad bin Salama Al -Azdi Al -Tahawi, who died in the year 321 AH, and it is a doctrine in accordance with the most of its discussions of what the people of the hadith and the impact believe, the Sunnis and the community, and a number of scholars mentioned that the imams of the four sects followed themselves; This is because it included the origins of the belief agreed upon among the scholars, in general, because there are places that were criticized for it.