Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
Bukhari :: Book 6 :: Volume 60 :: Hadith 386
Narrated Abdullah:
The first Sura in which a prostration was mentioned, was Sura An-Najm (The Star). Allah's Apostle prostrated (while reciting it), and everybody behind him prostrated except a man whom I saw taking a hand-full of dust in his hand and prostrated on it. Later I saw that man killed as an infidel, and he was Umaiya bin Khalaf.