(Al-Muaminoon) 23 : 32
فَأَرْسَلْنَا فِيهِمْ رَسُولًا مِنْهُمْ أَنِ اعْبُدُوا اللَّهَ مَا لَكُمْ مِنْ إِلَٰهٍ غَيْرُهُ ۖ أَفَلَا تَتَّقُونَ

And We sent them a Messenger from themselves saying: "You serve Lord Allah, you have no deity except Him; then will you not become heedful?"

See explanation 16: 2, 36; 21: 24-25 and 23: 23.