18:99
۞ وَتَرَكْنَا بَعْضَهُمْ يَوْمَئِذٍ يَمُوجُ فِى بَعْضٍ ۖ وَنُفِخَ فِى ٱلصُّورِ فَجَمَعْنَـٰهُمْ جَمْعًا
And We will leave them that day surging over each other, and [then] the Horn will be blown, and We will assemble them in [one] assembly.
The Cave
۞ وَتَرَكْنَا بَعْضَهُمْ يَوْمَئِذٍ يَمُوجُ فِى بَعْضٍ ۖ وَنُفِخَ فِى ٱلصُّورِ فَجَمَعْنَـٰهُمْ جَمْعًا
And We will leave them that day surging over each other, and [then] the Horn will be blown, and We will assemble them in [one] assembly.
Nearby ayahs help place verse 18:99 in sequence and meaning.
فَمَا ٱسْطَـٰعُوٓا۟ أَن يَظْهَرُوهُ وَمَا ٱسْتَطَـٰعُوا۟ لَهُۥ نَقْبًا
So Gog and Magog were unable to pass over it, nor were they able [to effect] in it any penetration.
قَالَ هَـٰذَا رَحْمَةٌ مِّن رَّبِّى ۖ فَإِذَا جَآءَ وَعْدُ رَبِّى جَعَلَهُۥ دَكَّآءَ ۖ وَكَانَ وَعْدُ رَبِّى حَقًّا
[Dhul-Qarnayn] said, "This is a mercy from my Lord; but when the promise of my Lord comes, He will make it level, and ever is the promise of my Lord true."
وَعَرَضْنَا جَهَنَّمَ يَوْمَئِذٍ لِّلْكَـٰفِرِينَ عَرْضًا
And We will present Hell that Day to the Disbelievers, on display -
ٱلَّذِينَ كَانَتْ أَعْيُنُهُمْ فِى غِطَآءٍ عَن ذِكْرِى وَكَانُوا۟ لَا يَسْتَطِيعُونَ سَمْعًا
Those whose eyes had been within a cover [removed] from My remembrance, and they were not able to hear.