Qur'an 11:118 · Hud

وَلَوْ شَآءَ رَبُّكَ لَجَعَلَ ٱلنَّاسَ أُمَّةًۭ وَٰحِدَةًۭ ۖ وَلَا يَزَالُونَ مُخْتَلِفِينَ

(118) And if your Lord had willed, He could have made mankind one community; but they will not cease to differ,