﴿ وَأَنزَلَ ٱلَّذِينَ ظَٰهَرُوهُم مِّنْ أَهْلِ ٱلْكِتَٰبِ مِن صَيَاصِيهِمْ وَقَذَفَ فِى قُلُوبِهِمُ ٱلرُّعْبَ فَرِيقًۭا تَقْتُلُونَ وَتَأْسِرُونَ فَرِيقًۭا ﴾

“and He brought down from their strongholds those of the followers of earlier reve­lation who had aided the aggressors, and cast terror into their hearts: some you slew, and some you made captive;”

(And He brought those of the People of the Scripture) they are Banu Qurayzah and Banu'l-Nadir: Ka'b Ibn Ashraf and Huyayy Ibn Akhtab and their hosts (who supported them) who supported the disbelievers of Mecca (down from their strongholds) from their mansions and towers, (and cast panic into their hearts) from Muhammad (pbuh) and his Companions, whereas before that they did not fear them and fought against them. (Some you slew) He says: you kill some of them, you sentence them to death, (and you made captive some) their children and women.