Sahih Bukhari
Sahih Bukhari Volume 002, Book 023, Hadith Number 384.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 23. Funerals (Al-Janaa'iz)
Narated By 'Abdullah : The Prophet said, "He who slaps the cheeks, tears the clothes and follows the tradition of the Days of Ignorance is not from us."