" Whatever else it may be, the Qur’an is no work of history. Startlingly, were it not for all the commentaries elucidating its mysteries, all the biographies of the Prophet, and all the sprawling collections of hadiths—none of which, in the form we have them, pre-dates the beginning of the third century after the hijra—we would have only the barest reason to associate it with a man named "

― Tom Holland , In the Shadow of the Sword: The Birth of Islam and the Rise of the Global Arab Empire