Abbas ibn Ali, son of Imam Ali

Al-Abbas ibn Ali ibn Abu-Talib, also known by the kunya Abu al-Fadl, was a son of Ali ibn Abi Talib, the fourth Rashid caliph in Sunni Islam and the first Imam in Shia Islam. His mother was Fatima bint Hizam, commonly known as Umm al-Banin. Abbas fought as the standard-bearer of his half-brother Husayn ibn Ali in the Battle of Karbala on 10 Muharram 61 AH against the army of the Umayyad caliph Yazid ibn Mu'awiya. He was killed in a desperate attempt to bring water from the Euphrates river to quench the unbearable thirst of the besieged family of the Islamic prophet Muhammad. Abbas is said to have inherited Ali's boldness and bravery, and was praised by Shia imams for his faith and fortitude in defending Husayn. Abbas is regarded by Shia Muslims as an ultimate paragon of courage and self-sacrifice. The shrine of Abbas and the nearby mausoleum of Husayn in Karbala are destinations for pilgrimage.

Ali ibn Abi Talib was the fourth Rashidun caliph who ruled from 656 CE until his assassination in 661, as well as the first Shia Imam. He was the cousin and son-in-law of the Islamic prophet Muhammad. Born to Abu Talib ibn Abd al-Muttalib and Fatima bint Asad, Ali was raised by his elder cousin Muhammad and was among the first to accept his teachings.