Hadith report, the scale of the report's transmission, the routes through which the report was transmitted, and the individual narrators involved in its transmission. On the basis of these criteria, various classifications were devised for hadith. The earliest comprehensive work in hadith studies was Abu Muhammad al-Ramahurmuzi's "al-Muhaddith al-Fasil", while another significant work was al-Hakim al-Naysaburi's "Ma‘rifat ‘ulum al-hadith". Ibn al-Salah's "ʻUlum al-hadith" is considered the standard classical reference on hadith studies. By means of hadith terminology, hadith are categorized as "ṣaḥīḥ" (sound, authentic), "ḍaʿīf" (weak), or "mawḍūʿ" (fabricated). Other classifications used also include: "ḥasan" (good), which refers to an otherwise
Ahl al-Hadith on to the early Sunni creed. This theological school, which is also known as traditionalist theology, has been championed in recent times by the Salafi movement. The term "ahl al-hadith" is sometimes used in a more general sense to denote a particularly enthusiastic commitment to hadith and to the views and way of life of the Salaf (exemplary early Muslims). The Ahl al-Hadith movement emerged toward the end of the eighth century CE among scholars of hadith who held the Quran and authentic hadith to be the only acceptable sources of law and creed. At first these scholars formed minorities