Answer. (Fatwa: 299/239/B=1433) (1) The Islamic Shariah is based on four foundations: (1) The Holy Quran. (2) Hadith. (3) Ijma (consensus). (4) Qiyas (analogy). It is necessary and wajib to follow these sources. Ijma and Qiyas have been extracted from the holy Quran and Hadith. According to Imran Ahsan Khan Nyazee, Islamic Jurisprudence ( Usul-ul- Fiqh ) is a body of principles of interpretation by the help of which the Mujtahid is able to derive the law from the detailed evidence in the Qura'nIjma'. 1. It is important to state that 4dEbLn.