The book Al-Ihkam fi Usul al-Ahkam is a book on the fundamentals of Islamic jurisprudence, written by Saif al-Din al-Amdi, in which he introduced the concept, definition, and subject matter of this science, the types of words, the truth of the legal judgment and its divisions, the governed and the governed against, and then talked about the legal evidence: The Book, the Sunnah, and consensus. He also talked about the news and what relates to it and other matters related to the fundamentals of jurisprudence.