Abu al-Abbās Ahmad Ibn Idris al-Araishi al-Alami al-Idrisi al-Hasani (Arabic: أبو العباس أحمد بن إدريس العرائشي العلمي الإدريسي الحسني) (1760–1837) was a Moroccan Sunni Islamic scholar, jurist and Sufi, active in Morocco, the Hejaz, Egypt, and Yemen. His main concern was the revivification of the sunnah or practice of the Islamic prophet Muhammad. For this reason, his students, such as the great hadith scholar Muhammad ibn Ali as-Senussi, gave him the title Muhyi 's-Sunnah "The Reviver of the Sunnah". His followers founded a number of important Sufi tariqas which spread his teachings across the Muslim world.