Instead of a perpetual and perfect measure of the divine will, the fragments of the Koran were produced at the discretion of Mahomet; each revelation is suited to the emergencies of his policy or passion; and all contradiction is removed by the saving maxim that any text of Scripture is abrogated or modified by any subsequent passage.
Edward Gibbon (1830). “The History Of The Decline And Fall Of The Roman Empire. By Edward Gibbon, Esq. Printed From The Edition In Twelve Volumes. With An Introductory Memoir Of The Author, By William Youngman”, p.913