Surah Al-Anbya 21:67

أُفٍّ لَّكُمْ وَلِمَا تَعْبُدُونَ مِن دُونِ ٱللَّهِ ۖ أَفَلَا تَعْقِلُونَ

Uff to you and to what you worship instead of Allāh. Then will you not use reason?"

Translation: Saheeh International

Tafsir

Fie read uffin or uffan with the sense of a verbal noun meaning ‘a putrid thing or a vile thing be’ on you and what you worship besides God that is other than Him. Do you not comprehend?’ that these idols are not worthy of being worshipped and are not fit for such a purpose — only God exalted be He is worthy of it.

Excerpt from Tafsir al-Jalalayn, commentary on 21:67, via Quran.com. The reader has the full commentary and 9 more tafsirs.