Quran 23:101

فَإِذَا نُفِخَ فِى ٱلصُّورِ فَلَآ أَنسَابَ بَيۡنَهُمۡ يَوۡمَٮِٕذٍ۬ وَلَا يَتَسَآءَلُونَ ١٠١

When the horn is blown, no relations among them will exist on that day, nor will they care about one another.