Mishkat al-Masabih 3962
He said:
We went on an expedition with God’s Messenger against Hawazin, and while we were having a meal in the forenoon with God’s Messenger a man came on a red camel, and after he had made it kneel he began to look around. Now we were in a weak condition and in a poor way with regard to mounts, and some of us were on foot. He went out in a hurry and coming to his camel made it go and it went off quickly with him. I hastened out and catching the camel’s nose-rein I made it kneel, then drew my sword and struck the man on his head. I then brought the camel leading it with his saddle and weapons on it, and when God's Messenger and the people met me he asked who had killed the man. On their replying that it was the son of al-Akwa‘, he said, “He gets all his spoil.” 

(Bukhari and Muslim.)
وَعَنْهُ قَالَ: غَزَوْنَا مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ هَوَازِنَ فَبَيْنَا نَحْنُ نَتَضَحَّى مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذْ جَاءَ رَجُلٌ عَلَى جَمَلٍ أَحْمَرَ فَأَنَاخَهُ وَجَعَلَ يَنْظُرُ وَفِينَا ضَعْفَةٌ وَرِقَّةٌ مِنَ الظَّهْرِ وَبَعْضُنَا مُشَاةٌ إِذْ خَرَجَ يَشْتَدُّ فَأَتَى جَمَلَهُ فَأَثَارَهُ فَاشْتَدَّ بِهِ الْجَمَلُ فَخَرَجْتُ أَشْتَدُّ حَتَّى أَخَذْتُ بِخِطَامِ الْجَمَلِ فَأَنَخْتُهُ ثُمَّ اخْتَرَطْتُ سَيْفِي فَضَرَبْتُ رَأْسَ الرَّجُلِ ثُمَّ جِئْتُ بِالْجَمَلِ أَقُودُهُ وَعَلَيْهِ رَحْلُهُ وَسِلَاحُهُ فَاسْتَقْبَلَنِي رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَالنَّاسُ فَقَالَ: «مَنْ قَتَلَ الرَّجُلَ؟» قَالُوا: ابْنُ الْأَكْوَعِ فَقَالَ: «لَهُ سَلَبُهُ أَجْمَعُ»