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Other important sources include the hadith collections, accounts of the verbal and physical teachings and traditions of Muhammad. Hadiths were compiled several generations after his death by followers including Muhammad al-Bukhari, Muslim ibn al-Hajjaj, Muhammad ibn Isa at-Tirmidhi, Abd ar-Rahman al-Nasai, Abu Dawood, Ibn Majah, Malik ibn Anas, al-Daraqutni.