Abū Bakr Aḥmad ibn Ḥusayn Ibn 'Alī ibn Mūsa al-Khosrojerdi al-Bayhaqi ( Larabci ), البيهقي wanda aka fi sani da Imām al-Bayhaqi an haife shi a shekara ta 994 AZ / 384 AH a cikin ƙaramin gari na Khosrowjerd kusa da Sabzevar, wanda a lokacin da aka fi sani da Bayhaq, a Khurasan . A lokacin rayuwarsa, ya zama sanannen malamin hadisi na Sunniah, yana bin makarantar Shafi'i a fiqh da Ash'ari makarantar Ilimin Addinin Musulunci . Cikakken sunan Al-Bayhaqi shine أحمد بن الحسين بن علي بن موسى الخراساني البيهقي المشهور بالبيهقي. Al-Bayhaqi masanin fiqhu ne na makarantar Shafi'i, da na hadisi . Ya yi karatun fiqh a karkashin Abū al-Fatḥ Nāṣir ibn al-Ḥusayn bn Muḥammad al-Naysaburi da kuma Abul Hasan Hankari . Ya kuma karanci hadisi a karkashin Hakim al-Nishaburi, Abu Mansur Al-Baghdadi da sauransu, kuma shi ne babban malamin al-Nishaburi. Ya mutu a shekara ta 1066 A.   [ <span title="This claim needs references to reliable sources. (November 2015)">Lissafi da ake bukata</span> ] Bayhaqi shahararren marubuci ne a lokacinsa, wanda ya wallafa juzu'o'i sama da dubu a cewar Al-Dhahabi .