Note 201 — THE PORTER AND THE THREE LADIES OF BAGHDAD.
Richard Francis Burton translation · Edition 2
Arab. "Amír al-Muuminín." The title was assumed by the Caliph Omar to obviate the inconvenience of calling himself "Khalífah" (successor) of the Khalífah of the Apostle of Allah (i.e. Abu Bakr); which after a few generations would become impossible. It means "Emir (chief or prince) of the Muumins;" men who hold to the (true Moslem) Faith, the "Imán" (theory, fundamental articles) as opposed to the "Dín," ordinance or practice of the religion. It once became a Wazirial title conferred by Sultan Malikshah (King King-king) on his Nizám al-Mulk. (Richardson's Dissert. lviii).