Sahih Bukhari
Sahih Bukhari Volume 002, Book 019, Hadith Number 182.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 19. Prostration During Recital of Qur'an
Narated By Ibn 'Umar : When the Prophet recited Surat As-Sajda and we were with him, he would prostrate and we also would prostrate with him and some of us (because of the heavy rush) would not find a place (for our foreheads) to prostrate on.