Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
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
tabarani:11573 – Aḥmad b. Dāwud al-Makkī > ʿAbd al-Raḥman b. Ṣāliḥ al-Azdī > Yūnus b. Bukayr > Muḥammad b. Isḥāq > Dāwud b. al-Ḥuṣayn > ʿIkrimah > Ibn ʿAbbās

[Machine] The verses in Surah Al-Ma'idah (5:42) "So judge between them by what Allah has revealed and do not follow their desires away from what has come to you of the truth. To each of you We prescribed a law and a method. Had Allah willed, He would have made you one nation [united in religion], but [He intended] to test you in what He has given you; so race to [all that is] good. To Allah is your return all together, and He will [then] inform you concerning that over which you used to differ." were revealed regarding the matter of Diyah (blood money) concerning the Banu Quraizah and Bani Nadir tribes. It was because the Banu Nadir had the honor of paying the Diyah in full, while the Banu Quraizah would only pay half of it. They presented the dispute to the Messenger of Allah ﷺ, so Allah revealed these verses in this regard. The Messenger of Allah ﷺ judged between them according to the truth, and made the Diyah equal for both tribes.  

الطبراني:١١٥٧٣ – حَدَّثَنَا أَحْمَدُ بْنُ دَاوُدَ الْمَكِّيُّ ثنا عَبْدُ الرَّحْمَنِ بْنُ صَالِحٍ الْأَزْدِيُّ ثنا يُونُسُ بْنُ بُكَيْرٍ عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ عَنْ دَاوُدَ بْنِ الْحُصَيْنِ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ قَالَ

إِنَّ الْآيَاتِ الَّتِي فِي الْمَائِدَةِ {فَاحْكُمْ بَيْنَهُمْ بِالْقِسْطِ إِنَّ اللهَ يُحِبُّ الْمُقْسِطِينَ} إِنَّمَا نَزَلَتْ فِي الدِّيَةِ فِي بَنِي قُرَيْظَةَ وَبَنِي النَّضِيرِ وَذَلِكَ أَنَّ قَبِيلَ بَنِي النَّضِيرِ كَانَ لَهُمْ شَرَفٌ يُؤَدُّونَ الدِّيَةَ كَامِلَةً وَإِنَّ بَنِي قُرَيْظَةَ كَانُوا يُؤَدُّونَ نِصْفَ الدِّيَةِ فَتَحَاكَمُوا فِي ذَلِكَ إِلَى رَسُولِ اللهِ ﷺ فَأَنْزَلَ اللهُ ذَلِكَ فِيهِمْ فَحَمَلَهُمْ رَسُولُ اللهِ ﷺ عَلَى الْحَقِّ فِي ذَلِكَ فَجَعَلَ الدِّيَةَ سَوَاءً  

See similar narrations below:

Collected by Nasāʾī, Nasāʾī's Kubrá
nasai:4733 – ʿUbaydullāh b. Saʿd from my uncle from my father > Ibn Isḥāq > Dāwud b. al-Ḥuṣayn > ʿIkrimah > Ibn ʿAbbās

"Either judge between them, or turn away from them. If you turn away from then up to: those who act justly."[1] - were revealed concerning the matter of blood money between An-Nadir and Quraizah. That was because the slain of An-Nadir were of noble status, so the blood money would be paid in full for them, but for Banu Quraizah only half of the blood money would be paid. They referred the matter to the Messenger of Allah for judgment, then Allah, the Mighty and Sublime, revealed that concerning them, so the Messenger of Allah told them to do the right thing and he made the blood money equal.  

النسائي:٤٧٣٣ – أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ سَعْدٍ قَالَ حَدَّثَنَا عَمِّي قَالَ حَدَّثَنَا أَبِي عَنِ ابْنِ إِسْحَاقَ أَخْبَرَنِي دَاوُدُ بْنُ الْحُصَيْنِ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ

أَنَّ الآيَاتِ الَّتِي فِي الْمَائِدَةِ الَّتِي قَالَهَا اللَّهُ ﷻ { فَاحْكُمْ بَيْنَهُمْ أَوْ أَعْرِضْ عَنْهُمْ } إِلَى { الْمُقْسِطِينَ } إِنَّمَا نَزَلَتْ فِي الدِّيَةِ بَيْنَ النَّضِيرِ وَبَيْنَ قُرَيْظَةَ وَذَلِكَ أَنَّ قَتْلَى النَّضِيرِ كَانَ لَهُمْ شَرَفٌ يُودَوْنَ الدِّيَةَ كَامِلَةً وَأَنَّ بَنِي قُرَيْظَةَ كَانُوا يُودَوْنَ نِصْفَ الدِّيَةِ فَتَحَاكَمُوا فِي ذَلِكَ إِلَى رَسُولِ اللَّهِ ﷺ فَأَنْزَلَ اللَّهُ ﷻ ذَلِكَ فِيهِمْ فَحَمَلَهُمْ رَسُولُ اللَّهِ ﷺ عَلَى الْحَقِّ فِي ذَلِكَ فَجَعَلَ الدِّيَةَ سَوَاءً  

nasai-kubra:6909 – ʿUbaydullāh b. Saʿd b. Ibrāhīm b. Saʿd b. Ibrāhīm b. ʿAbd al-Raḥman b. ʿAwf from my uncle from my father > Ibn Isḥāq > Dāwud b. Ḥuṣayn > ʿIkrimah > Ibn ʿAbbās

"Either judge between them, or turn away from them. If you turn away from then up to: those who act justly."[1] - were revealed concerning the matter of blood money between An-Nadir and Quraizah. That was because the slain of An-Nadir were of noble status, so the blood money would be paid in full for them, but for Banu Quraizah only half of the blood money would be paid. They referred the matter to the Messenger of Allah for judgment, then Allah, the Mighty and Sublime, revealed that concerning them, so the Messenger of Allah told them to do the right thing and he made the blood money equal. (Using translation from Nasāʾī 4733)   

الكبرى للنسائي:٦٩٠٩ – أَخْبَرَنَا عُبَيْدُ اللهِ بْنُ سَعْدِ بْنِ إِبْرَاهِيمَ بْنِ سَعْدِ بْنِ إِبْرَاهِيمَ بْنِ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ قَالَ حَدَّثَنَا عَمِّي قَالَ حَدَّثَنَا أَبِي عَنِ ابْنِ إِسْحَاقَ قَالَ حَدَّثَنِي دَاوُدُ بْنُ حُصَيْنِ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ أَنَّ الْآيَاتِ فِي الْمَائِدَةِ الَّتِي قَالَ

اللهُ فِيهَا {فَاحْكُمْ بَيْنَهُمْ أَوْ أَعْرِضْ عَنْهُمْ} [المائدة 42] إِلَى {الْمُقْسِطِينَ} [المائدة 42] إِنَّمَا نَزَلَتْ فِي الدِّيَةِ بَيْنَ بَنِي النَّضِيرِ وَبَنِي قُرَيْظَةَ وَذَلِكَ أَنَّ قَتْلَى النَّضِيرِ كَانَ لَهُمْ شَرَفٌ يُودَوْنَ الدِّيَةَ كَامِلَةً وَأَنَّ بَنِي قُرَيْظَةَ كَانُوا يُودَوْنَ نِصْفَ الدِّيَةِ فَتَحَاكَمُوا فِي ذَلِكَ إِلَى رَسُولِ اللهِ ﷺ «فَأَنْزَلَ اللهُ ذَلِكَ فِيهِمْ فَحَمَلَهُمْ رَسُولُ اللهِ ﷺ عَلَى الْحَقِّ فِي ذَلِكَ فَجَعَلَ الدِّيَةَ سَوَاءً»