Shari'ar da ke cikin Daular Musulunci ita ce tushe mafi arziki na ilimin fiqhu da littattafan shari'a a kowane zamani na bil'adama. Dakunan karatu na Bagadaza da Kufa (manyan biranen Daular Musulunci) suna alfahari da tarin littattafai da makaloli dubbai, wadanda suka kunshi dukkan bangarorin dokoki a harkokin yau da kullum na mutum, da nazarin fiqhu (dokar Musulunci). Haka girman nazari da kima da aka ba wannan muhimmin bangare na addinin Musulunci yake.

The judiciary in the Islamic State was the richest source of jurisprudence and juridicial works of any period of man. The libraries of Baghdad and Kufah (capitals of the Islamic State) boasted collections of tens of thousands of books and articles covering all aspects of legislation in the daily affairs of man, and the study of fiqh (Islamic law). Such was the extent of study and regard for this crucial aspect of the deen of Islam.

Abin takaici, a yau wannan gado ya kusan bace daga zukatan Musulmi da wadanda ba Musulmi ba a duniya baki daya. Babu inda adalcin Musulunci ya yi tasiri a matsayin karfin mulki, sakamakon haka duniya ta cika da rikici, inda adalci za a iya saye ko a yi amfani da shi ba daidai ba ga duk wanda ke da iko irin wannan. Sai dai idan an sake aiwatar da Musulunci gaba daya, duniya za ta koma ga daukakar da ta ji dadinta a karkashin Khilafah.