﴿ ۞ وَتَرَكْنَا بَعْضَهُمْ يَوْمَئِذٍۢ يَمُوجُ فِى بَعْضٍۢ ۖ وَنُفِخَ فِى ٱلصُّورِ فَجَمَعْنَٰهُمْ جَمْعًۭا ﴾

“AND ON that Day" We shall [call forth all mankind and] leave them to surge like waves [that dash] against one another; and the trumpet [of judgment] will be blown, and We shall gather them all together.”

(And on that day) the day when Gog and Magog break free; and it is also said: the day of return from Byzantium in that they were not able to defeat it, (We shall let some of them surge against others, and the Trumpet will be blown. Then We shall gather them together in one gathering).