Original sentence: Apostasy had actually begun in the lifetime of  Muhammad(PBUH), and the first major action of the apostasy was fought and satisfactorily concluded while Muhammad(PBUH) still lived.The tribes claimed that they had submitted to Muhammad(PBUH) and that with Muhammad(PBUH)'s death, their allegiance was ended.the news of his assassination reach shortly after the death of Muhammad(PBUH)
Edited sentence: Apostasy had actually begun in the lifetime of  Muhammad, and the first major action of the apostasy was fought and satisfactorily concluded while Muhammad still lived.The tribes claimed that they had submitted to Muhammad and that with Muhammad's death, their allegiance was ended.the news of his assassination reach shortly after the death of Muhammad