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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
ahmad:3434 – Muḥammad b. Salamah > Ibn Isḥāq > Dāwud b. Ḥuṣayn > ʿIkrimah

[Machine] "When the sons of Nadir would kill a person from the tribe of Qurayzah, they would pay them half of the blood money. And when the sons of Qurayzah would kill a person from the tribe of Nadir, they would pay them the full blood money. So the Messenger of Allah ﷺ settled the blood money between them."  

أحمد:٣٤٣٤ – حَدَّثَنَا مُحَمَّدُ بْنُ سَلَمَةَ عَنِ ابْنِ إِسْحَاقَ عَنْ دَاوُدَ بْنِ حُصَيْنٍ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ

فِي قَوْلِهِ ﷻ {فَإِنْ جَاءُوكَ فَاحْكُمْ بَيْنَهُمْ أَوْ أَعْرِضْ عَنْهُمْ وَإِنْ تُعْرِضْ عَنْهُمْ فَلَنْ يَضُرُّوكَ شَيْئًا وَإِنْ حَكَمْتَ فَاحْكُمْ بَيْنَهُمْ بِالْقِسْطِ إِنَّ اللهَ يُحِبُّ الْمُقْسِطِينَ} قَالَ كَانَ بَنُو النَّضِيرِ إِذَا قَتَلُوا قَتِيلًا مِنْ بَنِي قُرَيْظَةَ أَدَّوْا إِلَيْهِمْ نِصْفَ الدِّيَةِ وَإِذَا قَتَلَ بَنُو قُرَيْظَةَ مِنْ بَنِي النَّضِيرِ قَتِيلًا أَدَّوْا إِلَيْهِمُ الدِّيَةَ كَامِلَةً فَسَوَّى رَسُولُ اللهِ ﷺ بَيْنهُمُ الدِّيَةَ  

See similar narrations below:

Collected by Abū Dāwūd
abudawud:3591 – ʿAbdullāh b. Muḥammad al-Nufaylī > Muḥammad b. Salamah > Muḥammad b. Isḥāq > Dāwud b. al-Ḥuṣayn > ʿIkrimah > Ibn ʿAbbās

When this verse was revealed: "If they do come to thee, either judge between them, or decline to interfere....If thou judge, judge in equity between them." Banu an-Nadir used to pay half blood-money if they killed any-one from Banu Qurayzah. When Banu Qurayzah killed anyone from Banu an-Nadir, they would pay full blood-money. So the Messenger of Allah ﷺ made it equal between them.  

أبو داود:٣٥٩١ – حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ النُّفَيْلِيُّ حَدَّثَنَا مُحَمَّدُ بْنُ سَلَمَةَ عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ عَنْ دَاوُدَ بْنِ الْحُصَيْنِ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ قَالَ

لَمَّا نَزَلَتْ هَذِهِ الآيَةُ { فَإِنْ جَاءُوكَ فَاحْكُمْ بَيْنَهُمْ أَوْ أَعْرِضْ عَنْهُمْ } { وَإِنْ حَكَمْتَ فَاحْكُمْ بَيْنَهُمْ بِالْقِسْطِ } الآيَةَ قَالَ كَانَ بَنُو النَّضِيرِ إِذَا قَتَلُوا مِنْ بَنِي قُرَيْظَةَ أَدَّوْا نِصْفَ الدِّيَةِ وَإِذَا قَتَلَ بَنُو قُرَيْظَةَ مِنْ بَنِي النَّضِيرِ أَدَّوْا إِلَيْهِمُ الدِّيَةَ كَامِلَةً فَسَوَّى رَسُولُ اللَّهِ ﷺ بَيْنَهُمْ