Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:33:26 –

And He brought down those who supported them among the People of the Scripture from their fortresses and cast terror into their hearts ˹so that˺ a party you killed, and you took captive a party.  

And He brought down those of the People of the Scripture, namely, the ˹Banū˺ Qurayza, who had supported them from their strongholds (sayāsī is the plural of sīsa, and is that in which one fortifies himself ˹against an enemy˺) and He cast terror into their hearts, ˹so that˺ some, of them, you slew, and these were the combatants, and some, of them, you took captive, namely, their children.
القرآن:٣٣:٢٦ –

وَأَنْزَلَ الَّذِينَ ظَاهَرُوهُمْ مِنْ أَهْلِ الْكِتَابِ مِنْ صَيَاصِيهِمْ وَقَذَفَ فِي قُلُوبِهِمُ الرُّعْبَ فَرِيقًا تَقْتُلُونَ وَتَأْسِرُونَ فَرِيقًا  

{وأنزل الذين ظاهروهم من أهل الكتاب} أي قريظة {من صياصيهم} حصونهم جمع صيصة وهو ما يتحصن به {وقذف في قلوبهم الرعب} الخوف {فريقا تقتلون} منهم وهم المقاتلة {وتأسرون فريقا} منهم أي الذراري.