NO. They did not eat. They should not eat beef.
BUT, they have to consume a small quantity (mustard size) of goat meat as 'Prasad' of Devathas to make the sacrifice fruitful. IF they refuse, it is considered as humiliating Devathas & the sacrifice become futile. It is COMPULSORY to take meat of Goat as prasad after offering to devathas!.
So, understand that brahmins didn't eat heaps of beef after sacrifice.
BUT, they have to consume a small quantity (mustard size) of goat meat as 'Prasad' of Devathas to make the sacrifice fruitful. IF they refuse, it is considered as humiliating Devathas & the sacrifice become futile. It is COMPULSORY to take meat of Goat as prasad after offering to devathas!.
So, understand that brahmins didn't eat heaps of beef after sacrifice.