Sidi Bel Abbas or Sidi Ahmed abu al-Abbas al-Khazraji as-Sabti (Ceuta 1129 - Marrakesh 1204) is the patron saint of Marrakesh. He is also one of the "Seven Saints" (Sabʿatou Rijal) of the city. His festival was founded by Abu Ali al-Hassan al-Yusi at the instigation of Moulay Ismael.
Al-Abbas was born in Ceuta, but moved to Marrakesh in 1145-6, during the final weeks of the Almohad siege of the city. For a number of years he lived in a cave on the hill of Igilliz outside Marrakesh, only coming into town on Fridays for the communal prayer.
The Almohad sultan Yaqub al-Mansur was a disciple of al-Abbas. He asked him to come and live in the city and provided him a house, a hostel for his disciples as well as a madrasa for study. Teaching was maintained by the sultan's own funds. Whenever Yaqub al-Mansur visited al-Abbas he made a point of behaving in a humble manner and acting "as a servant".
To al-Abbas, every act of human mercy (rahma) evoked a merciful response from the all-merciful God (ar-Rahim). Al-Abbas summed up his theory of reciprocity with the maxim: "[Divine] Being is actualised by generosity" (al-wujud yanfa ilu bi'l-jud). The Andalusian philosopher Ibn Rushd visited al-Abbas several times in Marrakesh.
When al-Abbas died in 1204, he was buried at the graveyard of Sidi Marouk, near Bab Taghzout. In 1605, the Saadian sultan Abu Faris erected a mausoleum for al-Abbas, hoping that the saint's power would help him recover from his epilepsy. In 1998, sultan Hassan II improved the sanctuary. It is also the place of his zawiyya.
Al-Abbas's hagiography, Akhbar Abi'l-Abbas as-Sabti, written by Abu Ya’qub Yusuf ibn Yahya at-Tadili, was in part composed by al-Abbas himself and contains many autobiographical passages.