The people of (Banu) Quraiza agreed to accept the verdict of Saʿd bin Muʿadh. So the Prophet ﷺ sent for Saʿd, and the latter came (riding) a donkey and when he approached the Mosque, the Prophet ﷺ said to the Ansar, "Get up for your chief or for the best among you." Then the Prophet ﷺ said (to Saʿd)." These (i.e. Banu Quraiza) have agreed to accept your verdict." Saʿd said, "Kill their (men) warriors and take their offspring as captives, "On that the Prophet ﷺ said, "You have judged according to Allah's Judgment," or said, "according to the King's judgment."
سَمِعْتُ أَبَا سَعِيدٍ الْخُدْرِيَّ ؓ يَقُولُ نَزَلَ أَهْلُ قُرَيْظَةَ عَلَى حُكْمِ سَعْدِ بْنِ مُعَاذٍ فَأَرْسَلَ النَّبِيُّ ﷺ إِلَى سَعْدٍ فَأَتَى عَلَى حِمَارٍ فَلَمَّا دَنَا مِنَ الْمَسْجِدِ قَالَ لِلأَنْصَارِ قُومُوا إِلَى سَيِّدِكُمْ أَوْ خَيْرِكُمْ فَقَالَ هَؤُلاَءِ نَزَلُوا عَلَى حُكْمِكَ فَقَالَ تَقْتُلُ مُقَاتِلَتَهُمْ وَتَسْبِي ذَرَارِيَّهُمْ قَالَ قَضَيْتَ بِحُكْمِ اللَّهِ وَرُبَّمَا قَالَ بِحُكْمِ الْمَلِكِ