Prostration During Recital of Qur'an

Bukhari :: Book 2 :: Volume 19 :: Hadith 180

Narrated Abu Salma:

I saw Abu Huraira reciting Idha-Sama' un-Shaqqat and he prostrated during its recitation. I asked Abu Huraira, "Didn't I see you prostrating?" Abu Huraira said, "Had I not seen the Prophet prostrating, I would not have prostrated."