Sahih Bukhari Volume 007, Book 072, Hadith Number 735.
Narrated By Um Salama : One night the Prophet woke up, saying, "None has the right to be worshipped but Allah! How many afflictions have been sent down tonight, and how many treasures have been sent down (disclosed)! Who will go and wake up (for prayers) the lady dwellers of these rooms? Many well dressed soul (people) in this world, will be naked on the Day of Resurrection."