Mu'adh reported God’s Messenger as saying, “Fighting is of two kinds. The one who seeks God’s favour, obeys the leader, gives property he values, helps his associate and avoids doing mischief will have a reward for all the time he is asleep and awake, but the one who fights in a boasting spirit, for the sake of display and to gain a reputation, who disobeys the leader and does mischief in the earth will not return without credit or blame.’’*
Abu Huraira told that a man said, “Messenger of God, a man wishes to take part in jihad in God’s path desiring some worldly advantage." The Prophet replied, “He will have no reward."
'Abdallah b. ‘Amr told that he asked God’s Messenger to tell him about jihad and he replied, “If you fight with endurance, ‘Abdallah b. ‘Amr, seeking from God your reward, God will resurrect you showing endurance and seeking your reward from Him, but if you fight for vain show seeking to acquire much God will resurrect you making a vain show and seeking to acquire much. In whatever state you fight or are killed, ‘Abdallah b. ‘Amr, in that state God will resurrect you."
God’s Messenger announced an expedition, and as I was a very old man who had no servant I sought a hireling who would serve instead of me. I found a man to whom I offered three dinars, and when some booty arrived I wanted to give him his portion, so I went to the Prophet and mentioned the matter to him, but he said, “All I can find for him regarding this expedition of his in this world and the next is the three dinars which were offered him."