Fighting for the Cause of Allah (Jihaad)
Bukhari :: Book 4 :: Volume 52 :: Hadith 53
Narrated Anas bin Malik:
The Prophet said, "Nobody who dies and finds good from Allah (in the Hereafter) would wish to come back to this world even if he were given the whole world and whatever is in it, except the martyr who, on seeing the superiority of martyrdom, would like to come back to the world and get killed again (in Allah's Cause)."
Narrated Anas: The Prophet said, "A single endeavor (of fighting) in Allah's Cause in the afternoon or in the forenoon is better than all the world and whatever is in it. A place in Paradise as small as the bow or lash of one of you is better than all the world and whatever is in it. And if a houri from Paradise appeared to the people of the earth, she would fill the space between Heaven and the Earth with light and pleasant scent and her head cover is better than the world and whatever is in it."