Hadith of the Quran and Sunnah Aqil, Jafar, and their offsprings. Therefore, his interpretation is not set in stone. Nevertheless, he clearly says "His wives are the members of his family [household - ahlul bayt definition]. This is known to us as Hadith of the Quran and Sunnah Several hadith (oral tradition about the words and deeds of the Islamic prophet Muhammad) indicate the importance as sources of Islam not only the Quran (the revelation of God to Muhammad, infallible but containing compressed information), but also of the Sunnah of the Islamic prophet Muhammad (a detailed explanation of the everyday application of the principles established in
Introduction to the Science of Hadith adding six terms in the process). The first pertains to the "matn" (text) of the hadith and its three divisions and 30 types. The three divisions are "ṣaḥīḥ", "ḥasan", and "ḍa`īf". The thirty types include those mentioned in hadith terminology and others. The second deals with the "isnād" (chain of narration) and comprises 11 types. These types generally fall within the discipline of biographical evaluation. The third category includes six types: the qualifications necessary for conveying hadith, the manners in which they are transmitted, the transcription of hadith, and the etiquette of the narrator and of the student. The fourth