This book of fiqh (Islamic law) on the madhhab of Imam ash-Shafi'i, explaining the basics of Islam, such as prayer, fasting, Hajj, etc .. The importance of knowledge of fiqh said in the hadith of the Messenger of Allah (sallallaahu 'alaihi wa sallam): "The one to whom Allah wishes good, gives understanding (ar." Fiqh ") religion." Bukhari 71 (216/1) and Muslim 2386 (128/4).