Hadith of the Twelve Successors will be anything other than twelve. The twelve successors from the hadith (traditions of the prophet Muhammad) are already known as The Twelve Imams. Two hadiths form the basis and understanding of the 12 successors of the Prophet Muhammad: the hadith of the two weighty things and the hadiths regarding the 12 khalifs. One of the most authentic hadith (traditions of the sayings of the Prophet Muhammad) is Hadith thaqalain in which the Prophet Muhammad tells the muslims that he is leaving behind two weighty things, The quran and his ahlul bayt. Al-Tirmidhi in his Sunan records the following tradition:
Introduction to the Science of Hadith al-Ṣalāḥ, in his "Introduction", codified the terminology established by those scholars before him based upon his reading of their works. He did so by citing some of those scholarly statements in the earlier works and deducing from them common terms and definitions in the manner of a scholar authoring a book of "fiqh" (jurisprudence). In this manner, his book was based upon those principles established by the earlier hadith specialists combined with some elements of "fiqh". An example of this would be the inclusion of the division of hadith into "mutawātir" and "āḥād". He therefore only mentioned the statements of