Al-Kahf - 18:99

وَتَرَكْنَا بَعْضَهُمْ يَوْمَئِذٍ يَمُوجُ فِي بَعْضٍ وَنُفِخَ فِي الصُّورِ فَجَمَعْنَاهُمْ جَمْعًا
[18:99]
And on that day We will leave a part of them in conflict with another part, and the trumpet will be blown, so We will gather them all together;
On that day We shall leave them to surge like waves on one another: the trumpet will be blown, and We shall collect them all together.
And on that day we shall let some of them surge against others, and the Trumpet will be blown. Then We shall gather them together in one gathering.