This course sheds light on the following subjects. The definition to al-Ijtihad i.e. the legal reasoning and its types. The kinds of Jurists, Mujtahidun. The disagreement of the jurists in reasoning and how it is a sort of mercy. The reasons of the disagreement between the jurists. The schools of the companions, al-Sahabah, and al-Tabi‘in, in reasoning. The establishment of the schools of Islamic Jurisprudence. Furthermore, it covers a study of the methods of jurists after the period of al-Tabi‘in, which represents the ways of the Muslims in dealing with Islamic Jurisprudence in various parts of the world, such as Abu Hanifah in Iraq, Malik bin ’Anas in al-Hijaz, al-Layth bin Sa‘d in Egypt, Ja‘far al-Sadiq from the Shi‘i school, Ahmad bin Hanbal in Iraq, and ‘Abd al-Rahman al-’Awza‘i in al-Sham.