Surah Al-Baqarah · Ayah 170

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

Wa izaa qeela lahumuttabi'oo maaa anzalal laahu qaaloo bal nattabi'u maaa alfainaa 'alaihi aabaaa'anaaa; awalaw kaana aabaaa'hum laa ya'qiloona shai'anw wa laa yahtadoon

And when it is said to them, "Follow what Allah has revealed," they say, "Rather, we will follow that which we found our fathers doing." Even though their fathers understood nothing, nor were they guided?