Stories relating the words and deeds of the Prophet Muhammad, known as Hadith in Arabic, have long been esteemed by the vast majority of Muslims as a source of law and guidance second only to the Qur’an in authority. In recent years, an increasingly vocal Muslim opposition to Hadith insists that the Qur’an alone should be the sole source of religious law and guidance in Islam. Rashad Khalifa, Kassim Ahmad, Edip Yuksel, and Ahmad Subhy Mansour are among the most important rejecters of the Hadith, whose arguments influence a wide variety of groups popularly labeled Ahl al-Qur’an, Qur’niyyun or Qur’anists.