nAl-Kafi, Volume 2 of 8 (Usul al-Kafi) - Compiled by Thiqatu al-Islam, Abu Jafar Muhammad ibn Yaqub al-Kulayni; English Translation by Shaykh Muhammad Sarwar. Al-Kafi - The first and foremost comprehensive book of Hadith of the Holy Prophet, with his Ahl al-Bayt as narrators, dealing with issues of theology and ethics, practical laws such as laws of taharat (cleanliness), laws of worship (prayer, zakat, fasting, hajj and jihad), laws of business, laws of family and social relations, and judicial laws.