Muhammad ibn Abi Bakr
The Shi'a highly praise Muhammad ibn Abi Bakr for his devotion to ‘Ali and his resistance to the other rulers who were usurpers. Muhammad ibn Abi Bakr was a pious Muslim who supported the Imam of his time, Ali ibn Abi Talib, even though his sister Aisha opposed ‘Ali in the battle of Jamal, Ibn Abu Bakr was faithful to his stepfather. And he was in Ali's army in the Battle of Jamal and later it was Muhammad ibn Abi Bakr who escorted Aisha back to Madina. His grand daughter Fatima "(Umm Farwah)" was wife of Imam Muhammad al-Baqir. Thus Shi'a Imam after Imam Muhammad al-Baqir were his descendants from the mother side, starting with the great legal doctor of the Shi'a, Hanafi and Maliki Sunnis, Imam Ja'far al-Sadiq.