Usul

(lit. Root, origin, source, reason, cause) The roots or theoretical basis of Islamic law. Usul is used in two different meaning: principles and sources. In the meaning of sources, usul refers to the following four: the Qur’an, Sunnah, ijma’ and qiyas. The fist two are considered primary sources, while the latter two are formal sources. The jurists have added a number of other sources; Qarafi, a Maliki jurist, for instance counts thirteen sources of Islamic law. Usul refers to general principles. These include maxims (qawa’id), special methods of reasoning, e.g. Istislah, the basic doctrines of the founders of the schools of law, and the common principles on a certain legal subject (dawabit)

Usul

(sing.asl) lit., roots (opp. To furu`), the sources of fiqh (as usul al-fiqh)

Usul

Lit. Roots (sg. ‘asl), the sources of law, viz. The Qur`an, the Sunna, consensus, and analogical reasoning, as opposed to furu‘; short form for usul al-fiqh (works of)legal theory, methods of deriving positive law
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