Pedzisa mutsara unotevera: Somumwe wevanakomana vaduku vaHaruni, Abu Ishaq pakutanga akanga asina kukosha, uye haana kuonekwa mumutsara wokutsiva. Nokukurumidza pashure pokunge Harun afa muna 809,
Hondo yevagari vemo yakatanga pakati pehama dzake dzakakura-hama, al-Amin () na al-Ma'mun (). Al-Amin aifarirwa nekutsigirwa nevakuru vekare veAbbasid muBaghdad ("abnāʾ al-dawla"), nepo al-Ma'mun akatsigirwa nezvimwe zvikamu zve "abnāʾ". Al-Ma'mun akabuda achikunda muna 813 nokuzvipira kweBaghdad pashure pokukomba kwenguva refu uye rufu rwaal-Amin. Achisarudza kuramba ari munhare yake muKhurasan, kumucheto-chokuchamhembe kwakadziva kumabvazuva kwenyika yechiIslam, al-Ma'mun akabvumira vatariri vake vakuru kuti vatonge panzvimbo pake muIraq. Izvi zvakakonzera mafungu ekuvenga al-Ma'mun nevatsigiri vake "vechiPersia", vese vari pakati pevakuru veAbbasid muBaghdad uye kazhinji mumatunhu ekumadokero eCaliphate, zvichikonzera kusarudzwa kwemunin'ina waHarun al-Rashid Ibrahim semunhu anopesana nacaliph kuBaghdad muna 817. Chiitiko ichi chakaita kuti al-Ma'mun azive kusakwanisa kwake kutonga ari kure; achinamata kuvanhu, akadzinga kana kuuraya vabati vake vepedyo, uye akadzokera kuBaghdad muna 819 kuti atange basa rakaoma rekuvakazve nyika.