the son of the imām, Abū Bakr Aḥmad ibn al-Ḥusayn al-Bayhaqī, originally from Khusrawjird and a Shāfiʿī. He first settled in Khwarazm, then moved to Balkh, and the scholars of those regions took their learning from him.
He was born in 428 AH.
He narrated ḥadith from his father (1), from Abū Ḥafṣ ibn Masrūr, ʿAbd al-Ghāfir al-Fārisī, Abū ʿUthmān al-Ṣābūnī, Saʿīd ibn Abī Saʿīd al-ʿAyyār, and their peers. He was thoroughly versed in the Shāfiʿī school, taught regularly, and enjoyed great prestige (2).
Among those who transmitted from him were ʿAbbās ibn Arsalān; his grandson Maḥmūd, in the History of Khwarazm; the man of letters Muḥammad ibn Ibrāhīm al-Khayyāṭ; the Sufi shaykh Muḥammad ibn Arsalān; al-Ḥasan ibn Sulaymān al-Khujandī; and others. By way of written authorization, Abū Saʿd al-Samʿānī (3) also reported from him.
After an absence of thirty years he returned to Bayhaq, stayed only a few days, and passed away there in Jumādā al-Ākhira, 507 AH.
Others who narrated from him include Abū al-Qāsim Ismāʿīl ibn Aḥmad al-Samarqandī and a number of scholars from Baghdad. He lived to nearly eighty years, may Allah have mercy on him.