Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
Bukhari :: Book 6 :: Volume 60 :: Hadith 336
Narrated Abu Huraira:
I heard Allah's Apostle saying, "Allah will hold the whole earth, and roll all the heavens up in His Right Hand, and then He will say, 'I am the King; where are the kings of the earth?"'