Sahih al-Bukhari 7458
صحيح البخاري#7458SahihNarrated Abu Musa:A man came to the Prophet (ﷺ) and said, "A man fights for pride and haughtiness another fights for bravery, and another fights for showing off; which of these (cases) is in Allah's Cause?" The Prophet (ﷺ) said, "The one who fights that Allah's Word (Islam) should be superior, fights in Allah's Cause." (See Hadith No. 65, Vol)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 97:84