Narrated Ibn Ti'li:

We fought along with AbdurRahman ibn Khalid ibn al-Walid. Four infidels from the enemy were brought to him. He commanded about them and they were killed in confinement.

Abu Dawud said: The narrators other than Sa'id reported from Ibn Wahb in this tradition: "(killed him) with arrows in confinement." When Abu Ayyub al-Ansari was informed about it, he said: I heard the Messenger of Allah ﷺ prohibiting to kill in confinement. By Him in Whose hands my soul is, if there were a hen, I would not kill it in confinement. 'Abd al-Rahman b. Khalid b. al-Walid was informed about it (the Prophet's prohibition). He set four slaves free.

حَدَّثَنَا سَعِيدُ بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنِ وَهْبٍ، قَالَ أَخْبَرَنِي عَمْرُو بْنُ الْحَارِثِ، عَنْ بُكَيْرِ بْنِ عَبْدِ اللَّهِ بْنِ الأَشَجِّ، عَنِ ابْنِ تِعْلَى، قَالَ غَزَوْنَا مَعَ عَبْدِ الرَّحْمَنِ بْنِ خَالِدِ بْنِ الْوَلِيدِ فَأُتِيَ بِأَرْبَعَةِ أَعْلاَجٍ مِنَ الْعَدُوِّ فَأَمَرَ بِهِمْ فَقُتِلُوا صَبْرًا . قَالَ أَبُو دَاوُدَ قَالَ لَنَا غَيْرُ سَعِيدٍ عَنِ ابْنِ وَهْبٍ فِي هَذَا الْحَدِيثِ قَالَ بِالنَّبْلِ صَبْرًا فَبَلَغَ ذَلِكَ أَبَا أَيُّوبَ الأَنْصَارِيَّ فَقَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَنْهَى عَنْ قَتْلِ الصَّبْرِ فَوَالَّذِي نَفْسِي بِيَدِهِ لَوْ كَانَتْ دَجَاجَةٌ مَا صَبَرْتُهَا . فَبَلَغَ ذَلِكَ عَبْدَ الرَّحْمَنِ بْنَ خَالِدِ بْنِ الْوَلِيدِ فَأَعْتَقَ أَرْبَعَ رِقَابٍ .