21:25
وَمَآ أَرْسَلْنَا مِن قَبْلِكَ مِن رَّسُولٍ إِلَّا نُوحِىٓ إِلَيْهِ أَنَّهُۥ لَآ إِلَـٰهَ إِلَّآ أَنَا۠ فَٱعْبُدُونِ
wamā arsalnā min qablika min rasūlin illā nūḥī ilayhi annahu lā ilāha illā anā fa-uʿ'budūni
We never sent any messenger before you [Muhammad] without revealing to him: ‘There is no god but Me, so serve Me.’
And We did not send any Messenger before you (O Muhammad صلى الله عليه وسلم) but We revealed to him (saying): Lâ ilâha illa Ana [none has the right to be worshipped but I (Allâh)], so worship Me (Alone and none else)."