﴿ فَمَا ٱسْطَٰعُوٓا۟ أَن يَظْهَرُوهُ وَمَا ٱسْتَطَٰعُوا۟ لَهُۥ نَقْبًۭا ﴾

“And thus [the rampart was built, and] their enemies were unable to scale it, and neither were they able to pierce it.”

{ فَمَا اسْطَاعُوا أَنْ يَظْهَرُوهُ وَمَا اسْتَطَاعُوا لَهُ نَقْبًا ْ} أي: فما لهم استطاعة، ولا قدرة على الصعود عليه لارتفاعه، ولا على نقبه لإحكامه وقوته.