Al-Baqarah 2:85

Then there you are killing one another, and expelling a party of you from their habitations, conspiring (tazzāharūna: the original ta’ has been assimilated with the zā’; a variant reading has it without [the assimilation, that is, tazāharūna]), assisting one another, against them in sin, in disobedience, and enmity, injustice, and if they come to you as captives (a variant reading [for usārā] has asrā), you ransom them (a variant reading [for tafdūhum] has tufādūhum), that is to say, you deliver them from captivity with money etc., and this [ransoming] was one of the things to which they were pledged; yet their expulsion was forbidden you (muharramun ‘alaykum ikhrājuhum is semantically connected to wa-tukhrijūna, ‘and expelling’, and the statement that comes in between is parenthetical, that is, [expulsion was forbidden you] in the same way that non-ransoming was forbidden you). Qurayza had allied themselves with the Aws, and the Nadīr with the Khazraj, but every member of an alliance would fight against a fellow ally, thus destroying each other’s homes and expelling one another, taking prisoners and then ransoming them. When they were asked: ‘Why do you fight them and then pay their ransom?’, they would reply, ‘Because we have been commanded to ransom’; and they would be asked, ‘So, why do you fight them then?’, to which they would say, ‘For fear that our allies be humiliated’; God, exalted, says: What, do you believe in part of the Book, that is, the part about ransom, and disbelieve in part?, namely, the part about renouncing fighting, expulsion and assistance [against one another]; What shall be the requital of those of you who do that, but degradation, disgrace and ignominy, in the life of this world: they were disgraced when Qurayza were slewn and the Nadīr were expelled to Syria, and ordered to pay the jizya; and on the Day of Resurrection to be returned to the most terrible of chastisement? And God is not heedless of what you do (ta‘malūna, or read ya‘malūna, ‘they do’).