Sahih Bukhari
Sahih Bukhari Volume 004, Book 052, Hadith Number 050.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 52. Fighting for the Cause of Allah (Jihaad)
Narated By Anas bin Malik : The Prophet said, "A single endeavor (of fighting) in Allah's Cause in the forenoon or in the afternoon is better than the world and whatever is in it."