The Volunteers of the Faith was a military institution of the Emirate of Granada, composed by soldiers recruited from Zenata Berbers who were exiled from the Marinid Sultanate, to defend the Emirate against the Christian kingdoms of the Iberian Peninsula.

Abu Sa'id Uthman ibn Abi al-Ula was a Marinid prince who led an unsuccessful rebellion aiming to capture the throne, and fled to the Nasrid Emirate of Granada in its aftermath. There he served as the Commander of the Volunteers of the Faith of Granada, and became one of the most important political figures of the Nasrid realm.