Surat Hud (Hud) - هود

وَلَوْ شَآءَ رَبُّكَ لَجَعَلَ ٱلنَّاسَ أُمَّةً وَٰحِدَةً وَلَا يَزَالُونَ مُخْتَلِفِينَ ﴿١١٨﴾

And if your Lord had pleased He would certainly have made people a single nation, and they shall continue to differ.