Surah Al-Anbya — Ayah 64 (21:64)
فَرَجَعُوٓاْ إِلَىٰٓ أَنفُسِهِمۡ فَقَالُوٓاْ إِنَّكُمۡ أَنتُمُ ٱلظَّٰلِمُونَ ٦٤
English translation (Saheeh International)
So they returned to [blaming] themselves and said [to each other], "Indeed, you are the wrongdoers."
Brief commentary
So they turned to one another contemplating and considering. It had become clear to them that their idols do not benefit nor harm in any way, and so they were wrong in worshipping them instead of Allah.