A bedouin asked the Prophet, "A man may fight for the sake of booty, and another may fight so that he may be mentioned by the people, and a third may fight to show his position (i.e. bravery); which of these regarded as fighting in Allah's Cause?" The Prophet (ﷺ) said, "He who fights so that Allah's Word (i.e. Islam) should be superior, fights for Allah's Cause."
Sahih al-Bukhari Book 57, Hadith 35
← Previous Hadith `Umar said, "Were it not for those Muslims who have not come to existence yet, I would have distributed (the land of) every town I conquer among the fighters as the Prophet (ﷺ) distributed the land of Khaibar."

Sahih al-Bukhari Book 57, Hadith 34 Next Hadith → Some silken cloaks with golden buttons were presented to the Prophet. He distributed them amongst his companions and kept one for Makhrama, bin Naufal. Later on Makhrama came along with his son Al-Miswar bin Makhrama, and stood up at the gate and said (to his son). "Call him (i.e. the Prophet) to me." The Prophet (ﷺ) heard his voice, took a silken cloak and brought it to him, placing those golden buttons in front of him saying, "O Abu-al-Miswar! I have kept this aside for you! O Abu-al Miswar! I have kept this aside for you!" Makhrama was a bad-tempered man.

Sahih al-Bukhari Book 57, Hadith 36