الَّذِينَ عَاهَدتَّ مِنْهُمْ ثُمَّ يَنقُضُونَ عَهْدَهُمْ فِي كُلِّ مَرَّةٍ وَهُمْ لَا يَتَّقُونَ
—Those with whom you made a treaty, and who violated their treaty every time, and who are not Godwary.
Agha Ali Puya Commentary
Commentary on Quran 8:56
[Pooya/Ali Commentary 8:56] The immediate occasion was the repeated treachery of the Banu Qurayza after their treaties with the Holy Prophet. Violation of a covenant has been described as a treacherous crime. The Muslims also broke the covenant they made with the Holy Prophet, after his departure from this world. See commentary of al Ma-idah: 67.