Abu Ya'la al-Hanbali

Muhammad ibn al-Husayn ibn Muhammad Abu Ya'la al-Farra' al-Hanbali (380-458 AH / 990-1066 CE) was the chief Hanbali judge of Baghdad and one of the most important systematizers of Hanbali jurisprudence and theology. He studied under major Hanbali scholars of Baghdad and became the foremost Hanbali authority of his time, serving as the qadi al-qudat (chief judge) for the Hanbali community.

Abu Ya'la's most important contribution to Hanbali jurisprudence is his Kitab al-Mu'tamad fi Usul ad-Din (The Relied-Upon in the Foundations of Religion), a systematic treatment of Hanbali theology (aqeedah) in the mode of usul ad-din, engaging with the theological questions of divine attributes, prophethood, and related issues from a Hanbali perspective. He also authored al-Ahkam as-Sultaniyyah (The Ordinances of Government), a major work on Islamic political theory and constitutional law from the Hanbali perspective — closely parallel to and contemporary with the famous work of the same name by al-Mawardi from the Shafi'i school.

He also wrote Kitab al-Masail al-Fiqhiyyah, an extensive collection of Hanbali jurisprudential questions and answers; and works on hadith. His approach to Hanbali theology, particularly on the divine attributes, helped define the Hanbali theological tradition in the 5th century AH.

Abu Ya'la passed away in Baghdad in 458 AH. His al-Ahkam as-Sultaniyyah and his theological works are important contributions to the Hanbali tradition and to the history of Islamic political thought.