The Star - 53:23
They are nothing but names that you and your fathers called them, and Allah has not sent down for them any proof. They follow only their delusions and personal desires, while a guidance has come to them from their Lord.
The end of blindly following ancestors without questioning them:
Those Who Set The Ranks/37:68
Then their return is to Hell.
Those Who Set The Ranks/37:69
They found their forefathers astray.
Those Who Set The Ranks/37:70
And they were blindly following in their footsteps.
Those Who Set The Ranks/37:71
Many before them had gone astray in the same way.