Ali ibn al-Husayn Zayn al-'Abidin.

About Ali ibn al-Husayn Zayn al-'Abidin

Ali ibn al-Husayn al-Sajjad, also known as Zayn al-Abidin was the great-grandson of the Islamic prophet Muhammad and the fourth of the Twelve Imams, succeeding his father Husayn, his uncle Hasan, and his grandfather Ali. Born around 658 in Medina, al-Sajjad survived the Battle of Karbala in 680, in which Husayn and his small caravan were brutally massacred by the forces of the Umayyad caliph Yazid. After the battle, al-Sajjad and other survivors were treated poorly and taken to the Umayyad capital Damascus. Al-Sajjad was eventually allowed to return to his hometown of Medina, where he led a secluded life, without participating in the numerous pro-Alid uprisings against the Umayyads during the Second Fitna. Instead, he fully devoted his life to worship and learning, and was highly esteemed, even among proto-Sunnis, as a leading authority on hadith and Fiqh. He was known for his piety and virtuous character.