The Cow - 2:170
"When it is said to them, "Follow what Allah has sent down,"they say, "Nay, we follow the way of our fathers."And even if their forefathers were those who could not think and could not find the right path!"
The end of blindly following ancestors:
Those Who Set The Ranks/37:67
On top of that there is for them a hellish cocktail.
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.