﴿ 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 sent no messenger before you) O Muhammad (but We inspired him) tell your people that they should say: (There is no God save Me (Allah), so worship Me) so declare My divine Oneness.