An Nahl Ayah 93

وَلَوْ شَآءَ ٱللَّهُ لَجَعَلَكُمْ أُمَّةً وَٲحِدَةً وَلَـٰكِن يُضِلُّ مَن يَشَآءُ وَيَهْدِى مَن يَشَآءُ‌ۚ وَلَتُسْــَٔلُنَّ عَمَّا كُنتُمْ تَعْمَلُونَ ٩٣ Had Allah willed, He could have easily made you one community ?of believers?, but He leaves to stray whoever He wills and guides whoever He wills. And you will certainly be questioned about what you used to do.