فَمَا اسْطَـعُواْ أَن يَظْهَرُوهُ وَمَا اسْتَطَـعُواْ لَهُ نَقْبًا - قَالَ هَـذَا رَحْمَةٌ مِّن رَّبِّى فَإِذَا جَآءَ وَعْدُ رَبِّى جَعَلَهُ دَكَّآءَ وَكَانَ وَعْدُ رَبِّى حَقّاً - وَتَرَكْنَا بَعْضَهُمْ يَوْمَئِذٍ يَمُوجُ فِى بَعْضٍ وَنُفِخَ فِى الصُّورِ فَجَمَعْنَـهُمْ جَمْعاً
97. So they could not scale it or dig through it. 98. He said: â€This is a mercy from my Lord, but when the promise of my Lord comes, He shall Dakka' it down to the ground. And the promise of my Lord is ever true. 99. And on that Day, We shall leave some of them to surge like waves on one another; and the Trumpet will be blown, and We shall collect them (the creatures) all together. Allah tells us that Ya'juj and Ma'juj could not climb over the barrier or penetrate its lower portion. Varying forms of the verb are used here in the Arabic text to reflect the difficulty of the action referred to.