The people of Quraiza surrendered accepting the decision of Sa'd b. Mu'adh about them. Accordingly, the Messenger of Allah ﷺ sent for Sa'd who came to him riding a donkey. When he approached the mosque, the Messenger of Allah ﷺ said to the Ansar: Stand up to receive your chieftain. Then he said (to Sa'd): These people have surrendered accepting your decision. He (Sa'd) said: You will kill their fighters and capture their women and children. (Hearing this), the Prophet ﷺ said: You have adjudged by the command of God. The narrator is reported to have said: Perhaps he said: You have adjudged by the decision of a king. Ibn Muthanna (in his version of the tradition) has not mentioned the alternative words.
نَزَلَ أَهْلُ قُرَيْظَةَ عَلَى حُكْمِ سَعْدِ بْنِ مُعَاذٍ فَأَرْسَلَ رَسُولُ اللَّهِ ﷺ إِلَى سَعْدٍ فَأَتَاهُ عَلَى حِمَارٍ فَلَمَّا دَنَا قَرِيبًا مِنَ الْمَسْجِدِ قَالَ رَسُولُ اللَّهِ ﷺ لِلأَنْصَارِ قُومُوا إِلَى سَيِّدِكُمْ أَوْ خَيْرِكُمْ ثُمَّ قَالَ إِنَّ هَؤُلاَءِ نَزَلُوا عَلَى حُكْمِكَ قَالَ تَقْتُلُ مُقَاتِلَتَهُمْ وَتَسْبِي ذُرِّيَّتَهُمْ قَالَ فَقَالَ النَّبِيُّ ﷺ قَضَيْتَ بِحُكْمِ اللَّهِ وَرُبَّمَا قَالَ قَضَيْتَ بِحُكْمِ الْمَلِكِ وَلَمْ يَذْكُرِ ابْنُ الْمُثَنَّى وَرُبَّمَا قَالَ قَضَيْتَ بِحُكْمِ الْمَلِكِ