Kur’an 42:8 — sura Ash-Shuraa, 8. ajet

وَلَوۡ شَآءَ ٱللَّهُ لَجَعَلَهُمۡ أُمَّةٗ وَٰحِدَةٗ وَلَٰكِن يُدۡخِلُ مَن يَشَآءُ فِي رَحۡمَتِهِۦۚ وَٱلظَّـٰلِمُونَ مَا لَهُم مِّن وَلِيّٖ وَلَا نَصِيرٍ

A da Allah hoće, učinio bi ih sve pravim vjernicima, ali, On u milost Svoju uvodi koga On hoće, a nevjernici nemaju ni zaštitnika ni pomagača.

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