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
Criticism of Hadith these not just inspirational or informational but laws "sacrosanct or immutable Shari'ah" to be enforced, and because to others (especially modernist and liberal Muslims) the laws thus developed are "contrary to the intent and spirit of the Qur'an and Islam's fundamental commitment to justice and fairness", the "problem of the authenticity of the Sunnah" or hadith has become an issue for those (especially modernist and liberal Muslims) who believe there is a conflict between the "intent and spirit of the Qur'an" and "centuries-old" ahadith-based jurisprudence. According to M.O. Farooq, despite the widespread belief that sahih hadith are authentic hadith and