Ibn 'A'isha al-'Abbasi

Ibrahim ibn Muhammad ibn Abd al-Wahhab ibn Ibrahim al-Imam, of the descendants of al-Abbas ibn Abd al-Muttalib (may God be pleased with him). Al-Mas'udi describes him as a brother of al-Saffah and al-Mansur. Al-Ma'mun rode to him at night to the al-Mutbaq prison and killed him in 209 AH; Muhammad ibn Ibrahim al-Afriqi was killed with him. ²

Al-Mas'udi says he was the first Abbasid to be crucified in Islam. ²

His lineage as given in the report needs an additional source, since the wording calls him a brother of al-Saffah and al-Mansur while also placing him among the descendants of Imam Ibrahim.