Al-Ma'idah' - 5:104

وَإِذَا قِيلَ لَهُمْ تَعَالَوْاْ إِلَى مَا أَنزَلَ اللّهُ وَإِلَى الرَّسُولِ قَالُواْ حَسْبُنَا مَا وَجَدْنَا عَلَيْهِ آبَاءنَا أَوَلَوْ كَانَ آبَاؤُهُمْ لاَ يَعْلَمُونَ شَيْئًا وَلاَ يَهْتَدُونَ
[5:104]
And when it is said to them, Come to what Allah has revealed and to the Messenger, they say: That on which we found our fathers is sufficient for us. What! even though their fathers knew nothing and did not follow the right way.
When it is said to them: "Come to what Allah hath revealed; come to the Messenger": They say: "Enough for us are the ways we found our fathers following." what! even though their fathers were void of knowledge and guidance?
And when it is said unto them: Come unto that which Allah hath revealed and unto the messenger, they say: Enough for us is that wherein we found our fathers. What! Even though their fathers had no knowledge whatsoever, and no guidance?