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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.