A celebrated Hanbali jurist and a theologian, known for his awe-inspiring personality, and ardent enmity towards the Ash’arites. He was one of the great Sufi figures in the history, who authored Manazil al-Sa’irin – a manual in Tasawwuf – which was later expounded by Ibn al-Qayyim in Madarij al-Salikin. He was a fearless defender of the Hanbali faith such that he would often say: