Nyorai kuenderera mberi kweiyi ndima - Semumwe wevanakomana vadiki vaHaruni, Abu Ishaq pakutanga aive nemhedzisiro shoma, uye haana kuverengerwa mumutsara wenhaka. Nokukurumidza pashure pokunge Harun afa muna 809, hondo yevagari vemo ine utsinye
kwakaputika pakati pehanzvadzi 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.