A man came to the Prophet (ﷺ) and asked, "A man fights for war booty; another fights for fame and a third fights for showing off; which of them fights in Allah's Cause?" The Prophet (ﷺ) said, "He who fights that Allah's Word (i.e. Islam) should be superior, fights in Allah's Cause."
Sahih al-Bukhari Book 56, Hadith 26
← Previous Hadith Um Ar-Rubai'bint Al-Bara', the mother of Hartha bin Suraqa came to the Prophet (ﷺ) and said, "O Allah's Prophet! Will you tell me about Hartha?" Hartha has been killed (i.e. martyred) on the day of Badr with an arrow thrown by an unidentified person. She added, "If he is in Paradise, I will be patient; otherwise, I will weep bitterly for him." He said, "O mother of Hartha! There are Gardens in Paradise and your son got the Firdausal-ala (i.e. the best place in Paradise).

Sahih al-Bukhari Book 56, Hadith 25 Next Hadith → (who is `Abdur-Rahman bin Jabir) Allah's Messenger (ﷺ) said," Anyone whose both feet get covered with dust in Allah's Cause will not be touched by the (Hell) fire."

Sahih al-Bukhari Book 56, Hadith 27