Prayer (Kitab Al-Salat): Prostration while reciting the Qur'an
Dawud :: Book 7 : Hadith 1409
Narrated Aisha, Ummul Mu'minin:
The Apostle of Allah (peace_be_upon_him) prostrated himself at night when reciting the Qur'an. He said repeatedly: My face prostrates itself to Him Who created it and brought forth its hearing and seeing by His might and power.