﴿ وَلَقَدْ عَلِمْنَا ٱلْمُسْتَقْدِمِينَ مِنكُمْ وَلَقَدْ عَلِمْنَا ٱلْمُسْتَـْٔخِرِينَ ﴾

“And well do We know [the hearts and deeds of all human beings - both] those who lived before you and those who will come after you;”

Please check ayah 15:25 for complete tafsir.