Hadith of the Quran and Sunnah having been said during Muhammad's Farewell Sermon atop Mount Arafat after his Last Pilgrimage.(e.g. Malik Muwatta) Slightly varied versions are cited in many Sunni hadith works. Among those are: John Esposito explains the importance of the Hadith in Islam: "the Prophet Muhammad is seen as the "living Quran," the embodiment of God's will in his behavior and words. Sunni Muslims ... take their name from the "sunnah," meaning those who follow the example of the Prophet". Prof. Fatih Okumus refers to Muhammad as "the walking Qur’an," with the Sunnah giving an example to follow. As the sayings and deeds of
Criticism of Hadith According to Racha El Omari, early Mutazilites believed that hadith were susceptible to "abuse as a polemical ideological tool"; that the "matn" (content) of the hadith -- not just the "isnad" -- ought to be scrutinized for doctrine and clarity; that hadith "supported by some form of "tawātur"", i.e. by a large number of "isnād" strands, each beginning with a different Companion, were valid. In writing about "mutawatir" (transmitted via numerous chains of narrators) and "ahad" (any ahadith that is not "mutawatir") and its importance from the legal theoretician's point of view, Wael Hallaq notes the medieval scholar Al-Nawawi argued