said whatever he wanted. See also Hadith history Hadith types Hadith terminology Kutub al-Sittah Criticism of Hadith References Notes Citations Books and journal articles Jonathan A.C. Brown (2009), Hadith: Muhammad's Legacy in the Medieval and Modern World. Oneworld Publications. . Jonathan A.C. Brown (2007), The Canonization of al-Bukhārī and Muslim: The Formation and Function of the Sunnī Ḥadīth Canon. Brill Publishers. . External links A brief introduction to hadith studies Hadith Science Magazine Hadith