Quran 39:65 — The Throngs (Al-Zumar)

وَلَقَد أوحِىَ إِلَيكَ وَإِلَى الَّذينَ مِن قَبلِكَ لَئِن أَشرَكتَ لَيَحبَطَنَّ عَمَلُكَ وَلَتَكونَنَّ مِنَ الخٰسِرينَ

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.