Al Kahf Ayah 97 فَمَا ٱسْطَـٰعُوٓاْ أَن يَظْهَرُوهُ وَمَا ٱسْتَطَـٰعُواْ لَهُۥ نَقْبًا ٩٧ And so the enemies could neither scale nor tunnel through it.