(Al-Mursalath) 77 : 38
هَٰذَا يَوْمُ الْفَصْلِ ۖ جَمَعْنَاكُمْ وَالْأَوَّلِينَ
This is the Day of Decision; We have summoned you and the ancestors altogether.
That means: on the Day of Judgement, all human beings—from the first man, Adam, to the last man until Doomsday—will be assembled. See explanation 1: 3.