He studied jurisprudence under Shaykh Abū Ḥāmid (1), eventually taking his place in the teaching circle, and he was nothing short of remarkable for his insight, intelligence, and vast learning.
His father undertook a journey with him and enabled him to hear ḥadith from ʿAlī ibn ʿAbd al-Raḥmān al-Bakkāʾī (2) and others. In Baghdad he received transmissions from Abū al-Ḥusayn ibn al-Muẓaffar and scholars of that rank.
Abū Bakr al-Khaṭīb became his pupil and narrated from him, while his own father, Abū Ismāʿīl al-Ṣaffār, and others of similar standing also transmitted on his authority. He died in 407 AH.
Al-Sharīf al-Murtaḍā related: “Abū al-Ḥasan ibn al-Maḥāmilī entered to see me with Shaykh Abū Ḥāmid, and I had not previously known him. Abū Ḥāmid said to me, ‘This is Abū al-Ḥasan ibn al-Maḥāmilī, and today his mastery of jurisprudence surpasses mine.’ (3)
Abū Isḥāq al-Shīrāzī said: “He studied under Abū Ḥāmid and left behind a set of notes (4) that are attributed to him. He also composed numerous works on points of disagreement and on the school’s doctrine.”
The author adds: He compiled the book al-Majmūʿ in several volumes, and al-Muqniʿ (5).