From Sahih Bukhari (Hadith 3997):
Narrated Ibn `Abbas:Abu Sa`id bin Malik Al-Khudri returned from a journey and his family offered him some meat of sacrifices offered at `Id ul Adha. On that he said, "I will not eat it before asking (whether it is allowed)." He went to his maternal brother, Qatada bin Nu'man, who was one of the Badr warriors, and asked him about it. Qatada said, "After your departure, an order was issued by the Prophet (ﷺ) cancelling the prohibition of eating sacrifices after three days
Reference: Bukhari 3997