Surah Al-Anbya (21:25)

وَمَآ أَرْسَلْنَا مِن قَبْلِكَ مِن رَّسُولٍ إِلَّا نُوحِىٓ إِلَيْهِ أَنَّهُۥ لَآ إِلَٰهَ إِلَّآ أَنَا۠ فَٱعْبُدُونِ

And We did not send any messenger before you without revealing to him that “There is no god except Me, so serve Me.”