Surah Al-Anbya — Ayah 25 (21:25)
وَمَآ أَرۡسَلۡنَا مِن قَبۡلِكَ مِن رَّسُولٍ إِلَّا نُوحِيٓ إِلَيۡهِ أَنَّهُۥ لَآ إِلَٰهَ إِلَّآ أَنَا۠ فَٱعۡبُدُونِ ٢٥
English translation (Saheeh International)
And We sent not before you any messenger except We revealed to him that, "There is no deity except Me, so worship Me."
Brief commentary
And I have not sent before you, O Messenger, any messenger except that I revealed to him that there is no true god except Me, so worship Me alone and do not associate any partner with Me.