 Hadith of the Quran and Sunnah

Several hadith (oral traditions concerning the words and deeds of the Islamic prophet Muhammad) indicate the importance as sources of Islam not only the Quran (the revelation of God to Muhammad, infallible but containing compressed information), but also of the Sunnah (a detailed explanation of the everyday application of the principles established in the Qur'an, based on hadith).One of these hadith quotes Muhammad as saying (in his Farewell Sermon)