It has been narrated on the authority of 'Abdullah b. 'Amr that the Messenger of Allah (ﷺ) said:A troop of soldiers who fight in tile way of Allah and get their share of the booty receive in advance two-thirds of their reward in the Hereafter and only one-third will remain (to their credit). If they do not receive any booty, they will get their full reward.
حَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يَزِيدَ أَبُو عَبْدِ الرَّحْمَنِ، حَدَّثَنَا حَيْوَةُ بْنُ، شُرَيْحٍ عَنْ أَبِي هَانِئٍ، عَنْ أَبِي عَبْدِ الرَّحْمَنِ الْحُبُلِيِّ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " مَا مِنْ غَازِيَةٍ تَغْزُو فِي سَبِيلِ اللَّهِ فَيُصِيبُونَ الْغَنِيمَةَ إِلاَّ تَعَجَّلُوا ثُلُثَىْ أَجْرِهِمْ مِنَ الآخِرَةِ وَيَبْقَى لَهُمُ الثُّلُثُ وَإِنْ لَمْ يُصِيبُوا غَنِيمَةً تَمَّ لَهُمْ أَجْرُهُمْ " .
Muslim
The Book on Government • Hadith 220