The Hadith: Ibn Tumart left several works in Hadith, which are, in their entirety, a collection of Hadith arranged in treatises according to topics, or abridgments of books of Hadith from the Sahih collections. The most important of these works are the following: 1. Muwatta Al-Mu'atta: This is a book in which Al-Mahdi abridged the Muwatta of Imam Malik from the narration of Yahya bin Abdullah bin Bukayr Al-Makhzumi (d. 231 AH / 845 AD). He limited himself to the last narrator of the Hadith after deleting the rest of the chain of narration. Its attribution to Ibn Tumart is confirmed, as it carries at its beginning the complete chain of narration from Abd al-Mu'min, who dictated it, to Malik bin Anas. Its text is: (Our master and lord, the Caliph, the Imam Al-Mansur Al-Nasir li-Din Allah, Commander of the Faithful, Abu Muhammad Abd al-Mu'min bin Ali, may Allah exalt his affair and grant him victory, narrated to us in the presence of Marrakesh, may Allah protect it, on the second day of Monday, the third of Dhu al-Hijjah in the year 544 AH / 1149 AD: He said: The infallible Imam Al-Mahdi Al-Ma'lum, Abu Abdullah Muhammad bin Abdullah, may Allah be pleased with him and accept his deeds, narrated to us on the first of Ramadan Al-Mu'azzam in the year 515 AH / 1121 AD, in Ribat Hargah in the land of Souss. He said: The jurist Abu Abdullah Muhammad bin Mansur Al-Hadrami narrated to us. He said: The jurist Abu Muhammad bin Abdullah bin Al-Walid narrated to us. He said: The jurist Abu Muhammad Abdullah bin Abi Zayd narrated to us. He said: The jurist Abu Bakr Muhammad bin Muhammad bin Al-Labbad narrated to us. He said: The jurist Abu Zakariya Yahya bin Abdullah bin Bukayr Al-Makhzumi narrated to us, from Malik bin Anas, from Ibn Shihab, that Umar bin Abdul Aziz delayed the prayer.)

With this complete and clear chain of narration, it is incorrect to adopt the view of Professor Abdullah Ali Allam that this book was authored by a group of Al-Muwahhidun by order of Prince Yaqub Al-Mansur Al-Muwahidi, and that Al-Mahdi only contributed the book of Purification, which Yaqub ordered them to follow.

The known manuscript copies of this book are four, as follows: * Manuscript of the General Library in Rabat (483). Ibn Tumart, Muwatta Al-Mu'atta: (83). * See: Abdullah Ali Allam, Al-Da'wah, p. 308. * And see: A comprehensive refutation of it in: Al-Hasan Al-Abbadi, p. 1534.