ثُمَّ أَنتُمْ هَٰؤُلَاءِ تَقْتُلُونَ أَنفُسَكُمْ وَتُخْرِجُونَ فَرِيقًا مِّنكُم مِّن دِيَارِهِمْ تَظَاهَرُونَ عَلَيْهِم بِالْإِثْمِ وَالْعُدْوَانِ وَإِن يَأْتُوكُمْ أُسَارَىٰ تُفَادُوهُمْ وَهُوَ مُحَرَّمٌ عَلَيْكُمْ إِخْرَاجُهُمْ ۚ أَفَتُؤْمِنُونَ بِبَعْضِ الْكِتَابِ وَتَكْفُرُونَ بِبَعْضٍ ۚ فَمَا جَزَاءُ مَن يَفْعَلُ ذَٰلِكَ مِنكُمْ إِلَّا خِزْيٌ فِي الْحَيَاةِ الدُّنْيَا ۖ وَيَوْمَ الْقِيَامَةِ يُرَدُّونَ إِلَىٰ أَشَدِّ الْعَذَابِ ۗ وَمَا اللَّهُ بِغَافِلٍ عَمَّا تَعْمَلُونَ (85)
(2:85) But inspite of this, you are killing your brethren and driving them out from their homes and making unjust and aggressive alliances against one another. And when they come to you as captives, you trade on their ransoms whereas their expulsion itself was unlawful for you. Do you then believe in one part of the Scriptures and disbelieve in the other? *92 What other punishment do such people from among you deserve except an ignominious life in this world and the most grievous doom on the Day of Resurrection? Allah is not unaware of what you are doing.
*92). Before the advent of the Prophet (peace be on him) the Jewish tribes who lived on the outskirts of Madina had concluded an alliance with the Arab tribes of Aws and Khazraj. When the Arab tribes fought against one another each Jewish tribe fought on the side of its allies, which led to fratricide and so to a flagrant violation of the Book of God. Moreover, when the war ended the captives were ransomed. This ransom was justified on the basis of scriptural arguments; they extolled the Word of God when it permitted the ransom of prisoners of war, but attached no significance at all to the same Word of God when it prohibited mutual feuding.