Husayn ibn Ali

Abū ʿAbd Allāh al-Ḥusayn ibn ʿAlī ibn Abī Ṭālib was a grandson of the Islamic prophet Muhammad and a son of Ali ibn Abi Talib and Muhammad's daughter Fatima, as well as a younger brother of Hasan ibn Ali. He is the third Imam of Shia Islam after his brother, Hasan, and before his son, Ali ibn Husayn Zayn al-Abidin. Being a grandson of the prophet, he is a member of the Ahl al-Bayt. He is also considered to be a member of the Ahl al-Kisa, and a participant in the event of Mubahala. Muhammad described him and his brother, Hasan, as "the leaders of the youth of Paradise."