Quran 39:65 — The Throngs (Al-Zumar)

It has been revealed to you, and to those before you that if you ever commit idol worship, all your works will be nullified, and you will be with the losers.

[39:64] Say, "Is it other than GOD you exhort me to worship, O you ignorant ones?"

[39:66] Therefore, you shall worship GOD alone, and be appreciative.