2:85
ثُمَّ أَنتُمْ هَٰٓؤُلَآءِ تَقْتُلُونَ أَنفُسَكُمْ وَتُخْرِجُونَ فَرِيقًۭا مِّنكُم مِّن دِيَٰرِهِمْ تَظَٰهَرُونَ عَلَيْهِم بِٱلْإِثْمِ وَٱلْعُدْوَٰنِ وَإِن يَأْتُوكُمْ أُسَٰرَىٰ تُفَٰدُوهُمْ وَهُوَ مُحَرَّمٌ عَلَيْكُمْ إِخْرَاجُهُمْ ۚ أَفَتُؤْمِنُونَ بِبَعْضِ ٱلْكِتَٰبِ وَتَكْفُرُونَ بِبَعْضٍۢ ۚ فَمَا جَزَآءُ مَن يَفْعَلُ ذَٰلِكَ مِنكُمْ إِلَّا خِزْىٌۭ فِى ٱلْحَيَوٰةِ ٱلدُّنْيَا ۖ وَيَوْمَ ٱلْقِيَٰمَةِ يُرَدُّونَ إِلَىٰٓ أَشَدِّ ٱلْعَذَابِ ۗ وَمَا ٱللَّهُ بِغَٰفِلٍ عَمَّا تَعْمَلُونَ
Then, you are those [same ones who are] killing one another and evicting a party of your people from their homes, cooperating against them in sin and aggression. And if they come to you as captives, you ransom them, although their eviction was forbidden to you. So do you believe in part of the Scripture and disbelieve in part? Then what is the recompense for those who do that among you except disgrace in worldly life; and on the Day of Resurrection they will be sent back to the severest of punishment. And Allah is not unaware of what you do.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
The Terms of the Covenant and their Breach of It
Allah criticized the Jews who lived in Al-Madinah during the time of the Messenger of Allah ﷺ. They used to suffer, because of the armed conflicts between the tribes of Al-Madinah, Aws and Khazraj. Before Islam, the Aws and Khazraj worshipped idols, and many battles took place between them. There were three Jewish tribes in Al-Madinah at that time, Banu Qaynuqa` and Banu An-Nadir, the allies of the Khazraj, and Banu Qurayzah, who used to be the allies of the Aws. When war erupted between Aws and Khazraj, their Jewish allies would assist them. The Jew would kill his Arab enemy, and sometimes they also killed Jews who were the allies of the other Arab tribe, although the Jews were prohibited from killing each other according to clear religious texts in their Books. They would also drive each other from their homes and loot whatever furniture and money they could. When the war ended, the victorious Jews would release the prisoners from the defeated party, according to the rulings of the Tawrah. This is why Allah said,
أَفَتُؤْمِنُونَ بِبَعْضِ الْكِتَـبِ وَتَكْفُرُونَ بِبَعْضٍ
(Then do you believe in a part of the Scripture and reject the rest) Allah said,
وَإِذْ أَخَذْنَا مِيثَـقَكُمْ لاَ تَسْفِكُونَ دِمَآءِكُمْ وَلاَ تُخْرِجُونَ أَنفُسَكُمْ مِّن دِيَـرِكُمْ
(And (remember) when We took your covenant (saying): Shed not the blood of your (people), nor turn out your own people from their dwellings.) meaning, "Do not kill each other, nor expel one another from their homes, nor participate in fighting against them." Allah mentioned the word `your own' here, just as He said in another Ayah.