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
Introduction to the Science of Hadith the earlier scholars as appropriate and mostly sufficed with conclusions drawn from them and then specifying or clarifying a definition. The definitions Ibn al-Ṣalāḥ used to describe the individual terms of hadith terminology were largely in accordance with the views of the majority of hadith specialists. In some instances, he would mention an undisputed opinion, before mentioning one that was widely accepted and then describing the difference. He would generally precede his critique of differing opinions by saying: "I say". For the primary terms described, he mentioned an example to illustrate that definition. His goal in doing so was to