It has been narrated on the authority of A'isha who said: Sa'd was wounded on the day of the Battle of the Ditch. A man from the Quraish called Ibn al-Ariqah shot at him an arrow which pierced the artery in the middle of his forearm. The Messenger of Allah (may peacce be upon him) pitched a tent for him in the mosque and would inquire after him being in close proximity. When he returned from the Ditch and laid down his arms and took a bath, the angel Gabriel appeared to him and he was removing dust from his hair (as if he had just returned from the battle). The latter said: You have laid down arms. By God, we haven't (yet) laid them down. So march against them. The Messenger of Allah ﷺ asked: Where? He poirftad to Banu Quraiza. So the Messenger of Allah (may peace he upon him) fought against them. They surrendered at the command of the Messenger of Allah ﷺ, but he referred the decision about them to Sa'd who said: I decide about them that those of them who can fight be killed, their women and children taken prisoners and their properties distributed (among the Muslims).

وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَمُحَمَّدُ بْنُ الْعَلاَءِ الْهَمْدَانِيُّ، كِلاَهُمَا عَنِ ابْنِ نُمَيْرٍ، قَالَ ابْنُ الْعَلاَءِ حَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا هِشَامٌ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ أُصِيبَ سَعْدٌ يَوْمَ الْخَنْدَقِ رَمَاهُ رَجُلٌ مِنْ قُرَيْشٍ يُقَالُ لَهُ ابْنُ الْعَرِقَةِ . رَمَاهُ فِي الأَكْحَلِ فَضَرَبَ عَلَيْهِ رَسُولُ اللَّهِ ﷺ خَيْمَةً فِي الْمَسْجِدِ يَعُودُهُ مِنْ قَرِيبٍ فَلَمَّا رَجَعَ رَسُولُ اللَّهِ ﷺ مِنَ الْخَنْدَقِ وَضَعَ السِّلاَحَ فَاغْتَسَلَ فَأَتَاهُ جِبْرِيلُ وَهُوَ يَنْفُضُ رَأْسَهُ مِنَ الْغُبَارِ فَقَالَ وَضَعْتَ السِّلاَحَ وَاللَّهِ مَا وَضَعْنَاهُ اخْرُجْ إِلَيْهِمْ . فَقَالَ رَسُولُ اللَّهِ ﷺ
" فَأَيْنَ " . فَأَشَارَ إِلَى بَنِي قُرَيْظَةَ فَقَاتَلَهُمْ رَسُولُ اللَّهِ ﷺ فَنَزَلُوا عَلَى حُكْمِ رَسُولِ اللَّهِ ﷺ فَرَدَّ رَسُولُ اللَّهِ ﷺ الْحُكْمَ فِيهِمْ إِلَى سَعْدٍ قَالَ فَإِنِّي أَحْكُمُ فِيهِمْ أَنْ تُقْتَلَ الْمُقَاتِلَةُ وَأَنْ تُسْبَى الذُّرِّيَّةُ وَالنِّسَاءُ وَتُقْسَمَ أَمْوَالُهُمْ .