Sahih Bukhari Volume 9, Book 88, Hadith Number 189.

Narrated By Um Salama : (The wife of the Prophet) Allah’s Apostle woke up one night in a state of terror and said, “Subhan Allah, How many treasures Allah has sent down! And how many afflictions have been sent down! Who will go and wake the lady dwellers (wives of the Prophet) up of these rooms (for prayers)?” He meant his wives, so that they might pray. He added, “A well-dressed (soul) in this world may be naked in the Hereafter.”