Aḥmad Ibn Muḥammad Ibn Ḥanbal Abū ʿAbdullāh Ash-Shaybānī (احمد بن محمد بن حنبل ابو عبد الله الشيباني‎; 780–855 CE/164–241 AH), often referred to as Aḥmad ibn Ḥanbal or Ibn Ḥanbal for short, was an Arab Muslim jurist, theologian, ascetic, hadith traditionist, and founder of the Hanbali school of Sunni jurisprudence.