Surah An-Nahl, Verse 93

وَلَوۡ شَآءَ ٱللَّهُ لَجَعَلَكُمۡ أُمَّةࣰ وَٰحِدَةࣰ وَلَٰكِن يُضِلُّ مَن يَشَآءُ وَيَهۡدِي مَن يَشَآءُۚ وَلَتُسۡـَٔلُنَّ عَمَّا كُنتُمۡ تَعۡمَلُونَ ﴿٩٣﴾

Ve lev şaellahü le cealleküm ümmetev vahıdetev ve lakiy yüdıllü mey yeşaü ve yehdoı mey yeşa´ ve le tüs´elünne amma küntüm ta´melun

“If God so willed, He could make you all one people: But He leaves straying whom He pleases, and He guides whom He pleases: but ye shall certainly be called to account for all your actions”