The Imperial Firman Relative to Hereditary Succession was a firman (i.e., decree) issued by the Sultan of the Ottoman Empire Abdülaziz on 27 May 1866 at the request of Isma'il Pasha, the wāli (i.e. governor) of Egypt, which was then an Ottoman province. The firman changed the rule of succession in Egypt from one based on agnatic seniority to one based on male primogeniture in the direct line of Isma'il Pasha. The full text of the firman read as follows: