﴿ وَرَدَّ ٱللَّهُ ٱلَّذِينَ كَفَرُوا۟ بِغَيْظِهِمْ لَمْ يَنَالُوا۟ خَيْرًۭا ۚ وَكَفَى ٱللَّهُ ٱلْمُؤْمِنِينَ ٱلْقِتَالَ ۚ وَكَانَ ٱللَّهُ قَوِيًّا عَزِيزًۭا ﴾

“Thus, for all their fury, God repulsed those who were bent on denying the truth; no advantage did they gain, since God was enough to [protect] the believers in battle - seeing that God is most powerful, almighty;”

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.