Surah Ash-Shura 42:8
وَلَوْ شَآءَ ٱللَّهُ لَجَعَلَهُمْ أُمَّةً وَٰحِدَةً وَلَٰكِن يُدْخِلُ مَن يَشَآءُ فِى رَحْمَتِهِۦ ۚ وَٱلظَّٰلِمُونَ مَا لَهُم مِّن وَلِىٍّ وَلَا نَصِيرٍ ٨
EnglishSahih International
And if Allah willed, He could have made them [of] one religion, but He admits whom He wills into His mercy. And the wrongdoers have not any protector or helper.