Surah Al-Kahf (18:99)

وَتَرَكْنَا بَعْضَهُمْ يَوْمَئِذٍ يَمُوجُ فِى بَعْضٍ وَنُفِخَ فِى ٱلصُّورِ فَجَمَعْنَٰهُمْ جَمْعًا

And We left some of them that Day surging within others, and the Trumpet was blown, so We gathered them as a gathering.