Surah Al-Nahl (The Bees), Verse 51

وَقَالَ اللّٰهُ لَا تَتَّخِذُوْۤا اِلٰهَیْنِ اثْنَیْنِ اِنَّمَا هُوَ اِلٰهٌ وَّاحِدٌ فَاِیَّایَ فَارْهَبُوْنِ ۟

Wa qaalal laahu laa tatta khizooo ilaahainis naini innamaa Huwa Ilaahunw Waahid; fa iyyaaya farhaboon

“Allah has said: "Take not (for worship) two gods: for He is just One Allah: then fear Me (and Me alone)."”

Quran 16:51 (Yusuf Ali Translation)