حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَمَّادٌ، أَخْبَرَنَا عَطَاءُ بْنُ السَّائِبِ، عَنْ مُرَّةَ الْهَمْدَانِيِّ، عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏:‏ ‏"‏ عَجِبَ رَبُّنَا مِنْ رَجُلٍ غَزَا فِي سَبِيلِ اللَّهِ فَانْهَزَمَ ‏"‏ ‏.‏ يَعْنِي أَصْحَابَهُ ‏:‏ ‏"‏ فَعَلِمَ مَا عَلَيْهِ فَرَجَعَ حَتَّى أُهْرِيقَ دَمُهُ، فَيَقُولُ اللَّهُ تَعَالَى لِمَلاَئِكَتِهِ ‏:‏ انْظُرُوا إِلَى عَبْدِي رَجَعَ رَغْبَةً فِيمَا عِنْدِي وَشَفَقَةً مِمَّا عِنْدِي حَتَّى أُهَرِيقَ دَمُهُ ‏"‏ ‏.‏

Narrated Abdullah ibn Mas'ud: The Prophet (PBUH) said: Our Lord Most High is pleased with a man who fights in the path of Allah, the Exalted; then his companions fled away (i.e. retreated). But he knew that it was a sin (to flee away from the battlefield), so he returned, and his blood was shed. Thereupon Allah, the Exalted, says to His angels: Look at My servant; he returned seeking what I have for him (i.e. the reward), and fearing (the punishment) I have, until his blood was shed. Translation Not Available

Book Ref: Sunan Abi Dawud Book 15 Hadith 2536
Web Ref:  Sunan Abi Dawud Book 14 Hadith 2530