Al-Lu'lu Wal-Marjan 1244 — The Book of Al-Imâra (Concerning with ruling etc.)

Abu Musa Narrated from:

A man came to the Prophet ﷺ and asked, “O Allâh’s Messenger! What kind of fighting is in Allâh’s Cause? (I ask this), for some of us fight because of being enraged and angry and some for the sake of their pride and haughtiness.” The Prophet ﷺ raised his head (as the questioner was standing) and said, “He who fights that Allâh’s Word (i.e. Allâh’s Religion of Islâmic Monotheism) should be superior, fights in Allâh’s Cause.” ( Sahîh Al-Bukhâri, Hadîth No. 125, Vol. 1 )