Whakaotihia te rerenga e whai ake nei: Na te 811/2 i tohua a Ishaq e al-Amin hei kawana o Arminiyah, me tana tama a al-Fadl e mahi ana hei tuarua ki reira. Whai muri i te tīmatanga o te
pakanga a-iwi i waenga i a al-Amin me al-Ma'mun i whakatau ia ki te tu ki te kawanatanga me te whakahe ki te kaiawhina a al-Ma'mun a Tahir ibn Muhammad al-San'ani, i tukuna mai ki te hopu i Arminiyah me Adharbayjan mo tana kaitautoko. Whai muri i tana kohikohi i te tautoko o etahi rangatira o te rohe ka haere ia ki Barda, engari kaore i roa ka tutaki ia ki tetahi ope nui i arahina e Zuhayr ibn Sinan al-Tamimi i tukuna e al-San'ani ki a ia. Whai muri i te pakanga i roa mo te nuinga o te ra, ka hinga a Ishaq me ana kaitautoko, i te wa i hopukina ai tana tama a Ja'far ka tukuna hei herehere ki al-Ma'mun.