Until very recently, the concept of the sunna, and its legal authority was never questioned. However, the twentieth century witnessed a number of individuals and groups, who under the guise of ‘returning to the Qur’an’ have rejected in totality, the legal authority of the sunna. This study critically analyses the works of three well known hadith rejectors: Ghulam Ahmad Parwez, Rashad Khalifa, and Kassim Ahmad.