Surah An-Nahl — Ayah 51 (16:51)
۞ وَقَالَ ٱللَّهُ لَا تَتَّخِذُوٓاْ إِلَٰهَيۡنِ ٱثۡنَيۡنِۖ إِنَّمَا هُوَ إِلَٰهٞ وَٰحِدٞ فَإِيَّٰيَ فَٱرۡهَبُونِ ٥١
English translation (Saheeh International)
And Allāh has said, "Do not take for yourselves two1 deities. He [i.e., Allāh] is but one God, so fear only Me."
- - Meaning more than one.
Brief commentary
Allah, may He be glorified, said to all His servants: Do not take two beings of worship. The being deserving of worship is only one who has no second nor any partner. So fear Me only and do not fear others besides Me.