Just warfare, defense of the faith, and spiritual self-discipline. Volume 2: Social and Civil Transactions (Mu'amalaat)
Religious taxation, charity, and wealth redistribution. Sawm (Fasting): Rules governing the holy month of Ramadan. Daim Al-islam English Pdf
In the 10th century CE, the Fatimid Caliphate (a rival to the Abbasid Caliphate in Baghdad) ruled over North Africa and later Egypt. They followed Isma'ili Shi'ism. The fourth Fatimid Caliph-Caliph, Imam al-Mu'izz li-Din Allah , needed a single, authoritative legal code to unite their diverse empire (which included Sunnis, Christians, Jews, and various Shi'a groups). Just warfare, defense of the faith, and spiritual
The title Dā‘im al-Islām carries a dual meaning: defense of the faith