﴿ 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;”

At the Battle of Ahzab, or the Trenches, conditions were very severe. But, in this battle the stage of regular fighting was never reached. Almighty God sent stormy winds and an army of angels against the enemies and terrified them to such an extent that they themselves fled the battlefield. The Jews of Madinah (the Banu Qurayzah) had entered into a pact of peace with the Muslims, but on the occasion of the Battle of Ahzab, they betrayed the Muslims. In breach of the pact, they supported the idolaters. Therefore, when the army of the attackers left Madinah, the Prophet Muhammad, as ordained by God, invaded the areas occupied by the Banu Qurayzah and the Islamic forces besieged their forts. The siege lasted for twenty five days. When they surrendered, everything that they possessed was forfeited.