blind following of tradition

وَمَا يَتَّبِعُ أَكْثَرُهُمْ إِلَّا ظَنًّا ۚ إِنَّ ٱلظَّنَّ لَا يُغْنِى مِنَ ٱلْحَقِّ شَيْـًٔا ۚ إِنَّ ٱللَّهَ عَلِيمٌۢ بِمَا يَفْعَلُونَ

And most of them follow not except assumption. Indeed, assumption avails not against the truth at all. Indeed, Allāh is Knowing of what they do.

إِنْ هَـٰذَآ إِلَّا خُلُقُ ٱلْأَوَّلِينَ

This is not but the custom of the former peoples,