We have never sent any holy Messenger previous to you, O beloved, without the identical essential revelation: “There is absolutely no reality apart from Me, so remember Me ceaselessly.”
وَمَا أَرْسَلْنَا مِنْ قَبْلِكَ مِنْ رَسُولٍ إِلَّا نُوحِي إِلَيْهِ أَنَّهُ لَا إِلَٰهَ إِلَّا أَنَا فَاعْبُدُونِ
Wa maaa arsalnaa min qablika mir Rasoolin illaa nooheee ilaihi annahoo laaa ilaaha illaaa Ana fa'budoon