97 Preface فَمَا اسطاعوا أَن يَظهَروهُ وَمَا استَطاعوا لَهُ نَقبًاYusuf AliThus were they made powerless to scale it or to dig through it.1The iron wall and gates and towers were sufficiently high to prevent their being scaled and sufficiently strong with welded metal to resist any attempt to dig through them.