Mu’adh ibn Jabal reported: The Messenger of Allah, peace and blessings be upon him, said, “Military expeditions are two kinds. As for one who seeks the countenance of Allah, obeys the leader, spends in charity from his precious possessions, shows leniency to his colleagues, and avoids corruption, then the entirety of his sleep and vigilance is rewarded. As for one who fights out of pride, showing off, and seeking a reputation, who disobeys the leader and commits corruption in the land, then he will return with nothing of importance.”
Source: Sunan Abī Dāwūd 2515
Grade: Hasan (fair) according to Al-Albani
عَنْ مُعَاذِ بْنِ جَبَلٍ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَّهُ قَالَ الْغَزْوُ غَزْوَانِ فَأَمَّا مَنْ ابْتَغَى وَجْهَ اللَّهِ وَأَطَاعَ الْإِمَامَ وَأَنْفَقَ الْكَرِيمَةَ وَيَاسَرَ الشَّرِيكَ وَاجْتَنَبَ الْفَسَادَ فَإِنَّ نَوْمَهُ وَنُبْهَهُ أَجْرٌ كُلُّهُ وَأَمَّا مَنْ غَزَا فَخْرًا وَرِيَاءً وَسُمْعَةً وَعَصَى الْإِمَامَ وَأَفْسَدَ فِي الْأَرْضِ فَإِنَّهُ لَمْ يَرْجِعْ بِالْكَفَافِ
2515 سنن أبي داود كتاب الجهاد باب في من يغزو ويلتمس الدنيا
1990 المحدث الألباني خلاصة حكم المحدث إسناده حسن في السلسلة الصحيحة