Sahih Bukhari Volume 4, Book 55, Hadith Number 610.

Narated By Abu Said : The Prophet said, ‘People will be struck unconscious on the Day of Resurrection and I will be the first to regain consciousness, and behold! There I will see Moses holding one of the pillars of Allah’s Throne. I will wonder whether he has become conscious before me of he has been exempted, because of his unconsciousness at the Tur (mountain) which he received (on the earth).”