The Holy Qur'an

 

Muslims are required to believe not only in the divine scripture which is called the Qur'an, but it is essential for every Muslim to believe in all such divine revelations as were vouchsafed to other prophets, from wherever and whichever age. It is an essential part of a Muslim's belief that if anyone professes belief only in the divine origin of the Qur'an, and refuses to acknowledge the divine origin of other books, such as the Old Testament and the New Testament etc., his profession of Islam would be invalidated.