Sura 23 Al-Mu'minun (The Believers), ayah 52

1. وَإِنَّ هَٰذِهِ أُمَّتُكُمْ أُمَّةً وَاحِدَةً وَأَنَا رَبُّكُمْ فَاتَّقُونِ

   And indeed this, your religion, is one religion, and I am your Lord, so fear Me."

   23:52

Translation: Saheeh International