Nyora kupfuurira kweiyi ndima - Mushure mekufa kwaHarun al-Rashid muna 809, vanakomana vaviri vaHarun vakatanga kurwa
nokuda kwokutonga Umambo hweAbbasid. Mumwe mwanakomana, Al-Amin, aiva namai vechiArab uye nokudaro akanga ane tsigiro yavaArab, nepo munun'una wake wokubereka Al-Ma'mun aiva namai vechiPersia uye tsigiro yePersia. Pashure pokukunda munun'una wake, al-Ma'mun akatarisana nokumukira kwakawanda kubva kuvateveri vemhuri yaMuhammad munzvimbo dzakawanda.