Original sentence: Many members of Muhammad's clan, the Banu Hashim, as well as many of Muhammad's companions opposed the nomination of Abu Bakr; they held that Ali was the rightful successor of Muhammad, appointed by him at the Event of Ghadir Khumm..
Edited sentence: Many members of Muhammad's clan, the Banu Hashim, and several of his prominent companions opposed the nomination of Abu Bakr; they held that Ali was the rightful successor of Muhammad, appointed by him at the Event of Ghadir Khumm..