Yunus Ayah 19
وَمَا كَانَ ٱلنَّاسُ إِلَّآ أُمَّةً وَٲحِدَةً فَٱخْتَلَفُواْۚ وَلَوْلَا كَلِمَةٌ سَبَقَتْ مِن رَّبِّكَ لَقُضِىَ بَيْنَهُمْ فِيمَا فِيهِ يَخْتَلِفُونَ ١٩
Humanity was once nothing but a single community ?of believers?, but then they differed. Had it not been for a prior decree from your Lord, their differences would have been settled ?at once?.