Sahih Bukhari Volume 002, Book 019, Hadith Number 173.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 19. Prostration During Recital of Qur'an
Narated By 'Abdullah bin MasudÂ : The Prophet recited Suratan-Najm (103) at Mecca and prostrated while reciting it and those who were with him did the same except an old man who took a handful of small stones or earth and lifted it to his forehead and said, "This is sufficient for me." Later on, I saw him killed as a non-believer.