Surah Al-Anbya 21:54

قَالَ لَقَدْ كُنتُمْ أَنتُمْ وَءَابَآؤُكُمْ فِى ضَلَـٰلٍ مُّبِينٍ

He said, "You were certainly, you and your fathers, in manifest error."

Translation: Saheeh International

Tafsir

He said to them ‘Truly you and your fathers by worshipping them have been in manifest error’.

Excerpt from Tafsir al-Jalalayn, commentary on 21:54, via Quran.com. The reader has the full commentary and 9 more tafsirs.