Abū Muḥammad ʿAbd Allāh ibn al-Ḥasan ibn al-Ḥasan ibn ʿAlī ibn Abī Ṭālib al-Hāshimī al-Qurayshī (Arabic: أبو محمد عبد الله بن الحسن بن الحسن بن علي بن أبي طالب الهاشمي القریشي; c. 689 – 762, better known as ʿAbd Allāh al-Maḥḍ and ʿAbd Allāh al-Kāmīl, was an Islamic scholar, theologian and hadith narrator, grandson of both Hasan ibn Ali and Husayn ibn Ali. His sons include Muhammad and Ibrahim, who rebelled against Abbasid rule, and Idris, who rebelled in the Maghreb and established the Idrisid dynasty.