Original sentence: 7th century Arab merchant who claimed to have received revelations from what he conceived to be the God of his world through an angel while he was meditating in a cave near Medina Arabia.He is revered by Muslims who believe him to be the final prophet of the abrahamic God.Muslims consider that his work merely clarified and finalized what they conceive to be the "true religion", building on the work of other prophets of monotheism.Some have claimed that  Islam had existed before Muhammad though this latter assertion has been challenged as an anachronism by some historical scholars
Edited sentence: 7th century Arab merchant who claimed to have received revelations from God through an angel while he was meditating in a cave near Medina Arabia.He is revered by Muslims who believe him to be the final prophet of Allah (God).Muslims consider that his work merely clarified and finalized the true religion, building on the work of other prophets of monotheism; they believe Islam to have existed before Muhammad