This is a summary of our research, asking God Almighty for success and payment. Our research included two topics, the first of which dealt with an aspect of the biography of Imam Al-Shafi’i and the origins and terminology of his school of thought, as it was built on foundations based on the Book and the Sunnah, then the consensus on what is not in the Book or the Sunnah, then that some of the companions of the Prophet, may God’s prayers and peace be upon him, say and we do not know of him opposing them, then the analogy is based on Some layers, and nothing becomes to it other than the Book and the Sunnah, and they exist, but knowledge is taken from above.” Then we give preference according to the strongest and most correct evidence, with an indication of the approval of the weighting of the fatwa saying or not.This lies the importance of the issues that we study and we intend to collect them in one place