قَالَ أَفَتَعْبُدُونَ مِن دُونِ ٱللَّهِ مَا لَا يَنفَعُكُمْ شَيْـًٔا وَلَا يَضُرُّكُمْ
He said, "Then do you worship instead of Allah that which does not benefit you at all or harm you?
The Prophets
قَالَ أَفَتَعْبُدُونَ مِن دُونِ ٱللَّهِ مَا لَا يَنفَعُكُمْ شَيْـًٔا وَلَا يَضُرُّكُمْ
He said, "Then do you worship instead of Allah that which does not benefit you at all or harm you?
Nearby ayahs help place verse 21:66 in sequence and meaning.
فَرَجَعُوٓا۟ إِلَىٰٓ أَنفُسِهِمْ فَقَالُوٓا۟ إِنَّكُمْ أَنتُمُ ٱلظَّـٰلِمُونَ
So they returned to [blaming] themselves and said [to each other], "Indeed, you are the wrongdoers."
ثُمَّ نُكِسُوا۟ عَلَىٰ رُءُوسِهِمْ لَقَدْ عَلِمْتَ مَا هَـٰٓؤُلَآءِ يَنطِقُونَ
Then they reversed themselves, [saying], "You have already known that these do not speak!"
أُفٍّ لَّكُمْ وَلِمَا تَعْبُدُونَ مِن دُونِ ٱللَّهِ ۖ أَفَلَا تَعْقِلُونَ
Uff to you and to what you worship instead of Allah. Then will you not use reason?"
قَالُوا۟ حَرِّقُوهُ وَٱنصُرُوٓا۟ ءَالِهَتَكُمْ إِن كُنتُمْ فَـٰعِلِينَ
They said, "Burn him and support your gods - if you are to act."