Kitab al-Umm
The Kitāb al-Umm is the first exhaustive compendium of Islamic code of law that is used as an authoritative guide by the Shafi'i school of fiqh within the Sunni branch of Islam. The work was composed by the founder of the Shafi'i school, Imām ash-Shāfi‘ī. The term "al-Umm" means "the exemplar." The Kitab al-Umm is noted for its hermeneutic approach to developing legal principles, basing them on revelation rather than traditional authority.