The "Beginning of the Diligent and the End of the Economizer" is a theological book that contains comparative jurisprudence, written by the philosopher Ibn Rushd al-Maliki, grandson. It is considered one of the best books that include a statement of the reasons for the difference between the scientists in each issue. The book aims to prove to the reader the agreed and disputed judgments with evidence, issues, alarm jokes dispute in which what is going on stream assets and the rules of what it may be that responds to spoken in the Shara issues or related to operative with attached soon, the matters agreed upon or signed the infamous dispute between the Islamic scholars from the presence of Sahaba to be revealed by tradition. This book is perfect for those who want to gain a deeper understanding of Islamic jurisprudence and its principles. It is available for free and can be downloaded on Android devices.