Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
muslim:1906bMuḥammad b. Sahl al-Tamīmī > Ibn Abū Maryam > Nāfiʿ b. Yazīd > Abū Hāniʾ > Abū ʿAbd al-Raḥman al-Ḥubulī > ʿAbdullāh b. ʿAmr

A troop of soldiers, large or small, who fight (in the way of Allah), get their share of the booty and return safe and sound, receive in advance two-thirds of their reward (only one-third remaining to their credit to be received in the Hereafter) ; and a troop of soldiers, large or small, who return empty-handed and are afflicted or wounded, will receive their full reward (in the Hereafter).  

مسلم:١٩٠٦bحَدَّثَنِي مُحَمَّدُ بْنُ سَهْلٍ التَّمِيمِيُّ حَدَّثَنَا ابْنُ أَبِي مَرْيَمَ أَخْبَرَنَا نَافِعُ بْنُ يَزِيدَ حَدَّثَنِي أَبُو هَانِئٍ حَدَّثَنِي أَبُو عَبْدِ الرَّحْمَنِ الْحُبُلِيُّ عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ مَا مِنْ غَازِيَةٍ أَوْ سَرِيَّةٍ تَغْزُو فَتَغْنَمُ وَتَسْلَمُ إِلاَّ كَانُوا قَدْ تَعَجَّلُوا ثُلُثَىْ أُجُورِهِمْ وَمَا مِنْ غَازِيَةٍ أَوْ سَرِيَّةٍ تُخْفِقُ وَتُصَابُ إِلاَّ تَمَّ أُجُورُهُمْ