Imam Ja'far al-Sadiq (as) was a descendent of Abu Bakr through his mother. After Abu Bakr died, his wife Asma married Imam Ali, and thus Abu Bakr's son, Muhammad,was raised by 'Ali ibn Abi Talib. He became a staunch 'Alawi supporter, openly protesting against the corruption of the third caliph 'Uthman and taking part in the siege against 'Uthman's palace. He became a general in the army of Imam Ali, and fought for him at the Battle of the Camel (against Talha, Zubayr and his own sister Aisha) and at Siffeen against Mu'awiya (who had been made governor of Syria by 'Umar ibn Khattab). 'Ali ibn Abi Talib made him governor of Egypt during his short caliphate, but Ibn Abi Bakr was killed by the army of Amr ibn al-As who operated under Mu'awiya's governorship.