Abu Ja'afar, Mohammad ibn Ali ibn Shahr-Ashoob Mazandarani, nicknamed Rashid-Aldin and Ez-Aldin, and known as Ibn Shahr-Ashoob (AH 489-588) is a great Shia commentator, muhaddith, scholar and jurist of the 6th century AH. From the relation of "Saravi" given to him, his father and his grandfather, it appears that the origin of this family was from Sari of Mazandaran. This prominent Shia scholar played a prominent role in expanding and deepening the thoughts of the Ahl al-Bayt school. When the number of Shia in Tabarestan did not exceed 500 people, his father and grandfather were the flag bearers of the promotion of the Shia school. Ibn Shahr-Ashoob, under his father's upbringing and guidance, began to acquire knowledge from his childhood, as he knew the Quran by heart at the age of eight. In 547 AH, after a conflict with one of the local rulers, Ibn Shahr-Ashoob left Tabarestan and went to Baghdad. He left valuable works, the most important of which are - Manaqeb Ale Abi Taleb: in the description of the Ahl al-Bayt of the Prophet - Ma'alem Al-Olama: the list of Shia scholars - Moteshabe Al-Quran and Mokhtalefe: in the interpretation of Qur'an This wise jurist died in Aleppo on the night of Friday 22nd of Sha'ban 588 AH and was buried in Jabal al-Jushan, Syria, near a place known as Mashhad al-Hussein (AS).