The book Hisn e Haseen is different from other books of Hadees duas for a very special reason. At the time when Damascus was about to be destroyed by an attack of the Mongols, Imam Al-Jazri, a great Mohaddas of that time, compiled all the duas from authentic Ahadees of RasulAllah صلى الله عليه وسلم and named it Hisn e Haseen (meaning The Strongest Fort/qilla). He presented this book as a gift to RasulAllah صلى الله عليه وسلم and requested him to pray for the muslims