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

“and [this despite the fact that even] before thy time We never sent any apostle without having revealed to him that there is no deity save Me, - [and that,] therefore, you shall worship Me [alone]!”

And We did not send any Messenger before you but We revealed to him read nūhī or yūhā ‘but it was revealed to him’ that ‘There is no god except Me so worship Me’ that is affirm My Oneness.