Rubuta ci gaba don wannan sakin layi - An nada shi a watan Maris na 811 ta halifa al-Amin, wanda ya maye gurbin Hatim ibn Harthamah ibn A'yan. Ba da daɗewa ba, duk da haka, an tilasta masa ya yi yaƙi da yakin basasa.
tsakanin al-Amin da ɗan'uwansa al-Ma'mun, kuma ba da daɗewa ba ci gaba da aminci ga tsohon ya sanya shi cikin rikici tare da wani ɓangare na "jund" na gida wanda al-Sari ibn al-Hakam ya jagoranta, wanda ya fi son sanin al-Ma'mun a matsayin halifa a maimakon haka. A cikin bazara na 812 da "jund", tare da ƙarfafa al-Ma'mun, a fili switched su biyayya da tawaye, kuma Jabir aka kifar daga matsayinsa. Wani mai goyon bayan al-Ma'mun, Abbad ibn Muhammad ibn Hayyan, sannan ya zama gwamnan kuma ya karɓi iko a Fustat, amma sauran sassan Masar sun ci gaba da kasancewa da aminci ga al-Amin a ƙarƙashin anti-gwamna Rabi'ah ibn Qays ibn Zubayr al-Jurashi.