Quran 2:170 Al-Baqarah, ayah 170 of 286

وَإِذَا قِيلَ لَهُمُ ٱتَّبِعُوا۟ مَآ أَنزَلَ ٱللَّهُ قَالُوا۟ بَلْ نَتَّبِعُ مَآ أَلْفَيْنَا عَلَيْهِ ءَابَآءَنَآ ۗ أَوَلَوْ كَانَ ءَابَآؤُهُمْ لَا يَعْقِلُونَ شَيْـًٔا وَلَا يَهْتَدُونَ ۝١٧٠

2:170 And when it is said unto them: Follow that which Allah hath revealed, they say: We follow that wherein we found our fathers. What! Even though their fathers were wholly unintelligent and had no guidance?