Hud, 118 Ayah
11:118
وَلَوۡ شَآءَ رَبُّكَ لَجَعَلَ ٱلنَّاسَ أُمَّةٗ وَٰحِدَةٗۖ وَلَا يَزَالُونَ مُخۡتَلِفِينَ ١١٨
Wa Law Shā'a Rabbuka Laja`ala An-Nāsa 'Ummatan Wāĥidatan ۖ Wa Lā Yazālūna Mukhtalifīna
And if your Lord had willed, He could have made mankind one community; but they will not cease to differ.