Prostration During Recital of Qur'an

Bukhari :: Book 2 :: Volume 19 :: Hadith 182

Narrated 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.