Surah Az-Zukhruf 43:22

بَلْ قَالُوٓا۟ إِنَّا وَجَدْنَآ ءَابَآءَنَا عَلَىٰٓ أُمَّةٍ وَإِنَّا عَلَىٰٓ ءَاثَـٰرِهِم مُّهْتَدُونَ

Rather, they say, "Indeed, we found our fathers upon a religion, and we are in their footsteps [rightly] guided."

Translation: Saheeh International

Tafsir

Nay but they say ‘Lo! we found our fathers following a certain creed and we are indeed proceeding in their footsteps to be guided’ by them for they used to worship other than God.

Excerpt from Tafsir al-Jalalayn, commentary on 43:22, via Quran.com. The reader has the full commentary and 9 more tafsirs.