Qur'an, Al-Furqan, Surah 25:4-6
Unbelievers say, "The Qur'an is a forgery. Muhammad wrote it himself, with the help of others." Such words are both evil and false. Unbelievers say, "The Qur'an consists of ancient fables and legends. Muhammad dictates them every morning and evening." I reply, "The Qur'an is revealed by God, who knows the secrets of the heavens and the earth. He is forgiving and merciful."