and he exceeded all bounds, so he was made to drink poison. (1)

Next, his son al-Ḥasan took up the vizierate. He proved the worst of ministers—defiant and tyrannical—putting forty emirs to death. He did, however, show some inclination toward the sunnah, which caused his father to fear him. The caliph mustered an army against him and they fought for several days, after which the father again administered poison. (2) By that time his days had already grown long. (3)

He died on the fifth of Jumada I in 544 AH; his reign had lasted twenty years, lacking five months.
He lived to the age of seventy-seven.
No one among the ʿUbaydids reached so advanced an age, and he was succeeded by his son al-Zāfir. (4)

76 – al-Zāfir bi-Llāh Ismāʿīl ibn al-Ḥāfiẓ li-Dīn Allāh *

Lord of Egypt, al-Zāfir bi-Llāh, Abū Manṣūr Ismāʿīl ibn al-Ḥāfiẓ li-Dīn Allāh ʿAbd al-Majīd ibn Muḥammad ibn al-Mustanṣir Maʿadd ibn al-Ẓāhir ʿAlī ibn al-Ḥākim—the ʿUbaydid, the Egyptian, the Ismaʿili, of the ʿUbaydid line that rebelled against the Banū al-ʿAbbās.

He held power after his father for five years.

He was a handsome, elegant youth, fond of play, ever devoted to music and to the company of concubines.