Al - Bayhaqi, full name Abū Bakr Ahmad ibn Husayn ibn ʿ Ali ibn Musa al - Chusraudschirdī al - Bayhaqi (Arabic أبو بكر أحمد بن الحسين بن علي بن موسى الخسروجردي البيهقي, DMG Abu Bakr Aḥmad b. al -Husayn b. ʿ Alī b Musa al - al - Bayhaqi Ḫusrauǧirdī, * 994 in the small town near Khusraugird Baihaq in Khorasan; . † 1066) was a Sunni scholar of the Shafi ʿ tradition itischen teaching direction.

Al - Bayhaqi has written several works, including "The Book of the great traditions " ( Kitaab al- Sunan al - Kubra ) in ten volumes. Of great importance for the Islamic Prophet Muhammad worship was his work "The evidence of prophecy and knowledge of the affairs of the Lord of Sharia" ( DALA ʾ il on - nubūwa wa -ma ʿ rifat Ahwal Sahib aš sari ʿ a) in seven volumes. In it he gives an overview of all the events that took place before and after the birth of Muhammad and point to his prophets dignity, including his noble descent, his outer characteristics as well as stories about people, animals and jinn who recognized him in his prophetic office.