Bahauddin Abu'l Ma'ali Ibn Shadad

Abu al-Mahasin Bahā' al-Dīn Yūsuf bin Rafīʿ bin Tamīm bin Shaddād al-Asadī al-Mawsilī, known as Ibn Shaddād (1145–1234), was a Muslim judge, scholar, and historian who chronicled the period during which he lived, contemporaneous with Saladin.

Source: Wikipedia