Sahih Bukhari Volume 008, Book 075, Hadith Number 385.

Narated By Sa'd : Seek refuge with Allah by saying the words which the Prophet used to say while seeking refuge with Allah, "0 Allah! I seek refuge with You from cowardice, and seek refuge with You from miserliness, and seek refuge with You from reaching a degraded geriatric old age, and seek refuge with You from the afflictions of the world and from the punishment in the grave."