ʿAbd al-Raḥmān al-Dabbās, Manṣūr ibn Muḥammad ibn Muḥammad al-Azdī in Herāt, Abū Ḥassān Muḥammad ibn Aḥmad al-Muzakkī, Abū Saʿd ʿAbd al-Raḥmān ibn Ḥamdān, ʿUmar ibn Masrūr, and their peers in Nishapur; Abū Ṭālib ibn Ghaylān; Bushrā al-Fātanī (1); Abū Muḥammad al-Khallāl in Baghdad; and Abū Bakr ibn Rīdhah (2) in Isfahān.

He collected a vast body of material, preserved it carefully, and arranged it by subject headings.

Those who narrated from him include Muḥammad ibn ʿAbd al-ʿAzīz al-ʿIjlī al-Marwazī, ʿAbd al-Wāḥid ibn al-Faḍl al-Ṭūsī, Abū Naṣr Aḥmad ibn ʿUmar al-Ghāzī, Muḥammad ibn ʿAbd al-Wāḥid al-Daqqāq, Abū al-Asʿad ibn al-Qushayrī, and many others. Abū Bakr al-Khaṭīb—one of his own teachers—also transmitted from him, and his teacher al-Ṣūrī heard from him as well.

Al-Daqqāq said, “Among the hadith scholars I have seen no one more meticulous in verification or better in precision than he.” (3)

Zāhir al-Shaḥḥāmī said, “Masʿūd al-Sijzī inclined toward the Qadarite doctrine, and he would recite the report ‘faḥajja Ādama Mūsā’ with Ādam in the accusative.” (4)

Masʿūd died in Nishapur in Jumādā al-Ūlā, 477 AH (5). Imām al-Ḥaramayn Abū al-Maʿālī led his funeral prayer. He endowed his books—numerous, precious, and carefully copied—to the public benefit. (6)