Muḥammad ibn ʿĪsā was forced to surrender to them everything he owned; he then remained in the khanqah (Sufi lodge) poor, needy, sick, and humbled until death overtook him. He had been born in 354 AH.
I add: Among those who narrated from him was the ḥāfiẓ Abū Bakr al-Khaṭīb.
372 – al-Mustaghfirī, Abū al-ʿAbbās Jaʿfar ibn Muḥammad ibn al-Muʿtazz
The Imām, ḥadith memoriser, precisionist, and author—Abū al-ʿAbbās Jaʿfar ibn Muḥammad ibn al-Muʿtazz ibn Muḥammad ibn al-Mustaghfir ibn al-Fatḥ ibn Idrīs al-Mustaghfirī, al-Nasafī.
He wrote the following works: Maʿrifat al-Ṣaḥābah (Knowledge of the Companions), al-Daʿawāt (Supplications), Dalāʾil al-Nubuwwah (Proofs of Prophethood), Faḍāʾil al-Qurʾān (Virtues of the Quran), al-Shamāʾil, Khuṭab al-Nabī ﷺ (The Prophet’s Sermons), Tārīkh Nasaf (History of Nasaf), al-Ṭibb (Medicine) (1), Tārīkh Kish (History of Kish), and other titles besides.
He transmitted hadith from Zāhir ibn Aḥmad al-Sarakhsī, Ibrāhīm ibn Luqmān, Abū Saʿīd ʿAbd Allāh ibn Muḥammad ibn ʿAbd al-Wahhāb al-Rāzī, ʿAlī ibn Muḥammad ibn Saʿīd al-Sarakhsī, Jaʿfar ibn Muḥammad al-Bukhārī, and many others.
To the best of my knowledge, he never travelled to Iraq.