Overview
Muḥammad ibn Abī Bakr (; 631–657), was the youngest son of the first Islamic caliph Abu Bakr. His mother was Asma bint Umais, who was a widow of Ja'far ibn Abi Talib prior to her second marriage with Abu Bakr. He became the stepson of the fourth caliph Ali, and became one of his generals. He was one of the main figures in rebellion against Uthman and was actively involved in siege of his house which resulted in caliph's death. Gayyab narrates in his book Fitnat Maqtal ‘Uthman, 1/209 that "it is clear that Muhammad ibn Abi Bakr was innocent in the murder of Usman, just as the wolf was innocent of the blood of Yusuf ‘alayh al Salam."
Life
He was a son of Abū Bakr from his marriage with Asma bint Umays. When Abu Bakr died, Asma bint Umais married Ali ibn Abi Talib. Muhammad ibn Abi Bakr had a son named Qasim ibn Muhammad ibn Abi Bakr. Qasim ibn Muhammad ibn Abi Bakr's wife was called Asma and she was the daughter of Abd al-Rahman ibn Abi Bakr who was Abu Bakr's other son. The daughter of Qasim ibn Muhammad ibn Abi Bakr and Asma was called Fatima (Umm Farwah).
After the Battle of Siffin, Ali ibn Abi Talib appointed Muhammad ibn Abi Bakr as the Governor of Egypt, then a newly conquered province of the Islamic empire. In 658 CE (38 AH), Mu'awiya ibn Abi Sufyan, the then Governor of Syria, sent his general Amr ibn al-As and six thousand soldiers against Muhammad ibn Abi Bakr. He hadn't proved himself to be a good governor, Lesley Hazleton writes "Muhammad AbuBakr – Aisha's half brother – had proved a weak governor. Ali himself ruefully acknowledged that he was "an inexperienced young man". Muhammad asked Imam Ali for help. Ali is said to have instructed his foster son to hand the governorship over to his best general and childhood friend, Malik al-Ashtar, whom he judged better capable of resisting Amr ibn al-As. However, Malik died on his way to Egypt. The Shi'a and Institute for Shia Ismaili Studies and London's Shi'aism researcher Wilferd Madelung believe that Malik was poisoned by Muawiyah I.
Ibn Abi Bakr was eventually defeated by 'Amr ibn al-'As. 'Amr's soldiers were ordered to capture him, bring him alive to Muawiyah I or kill him. A soldier named Mu'awiya ibn Hudayj is said to have quarreled with the prisoner and killed him out of hand. Ibn Hudayj was so incensed at Ibn Abi Bakr that he put his body into the skin of a dead donkey and burned both corpses together, so that nothing should survive of his enemy.
From Wikipedia (CC BY-SA 4.0).