Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
Bukhari :: Book 6 :: Volume 60 :: Hadith 337
Narrated Abu Huraira:
The Prophet said, "I will be the first to raise my head after the second blowing of the trumpet and will see Moses hanging the Throne, and I will not know whether he had been in that state all the time or after the blowing of the trumpet."