From Sahih Bukhari (Hadith 5573):
Narrated Abu `Ubaid:(in continuation of above). Then I witnessed (the 'Its) with `Ali bin Abi Talib, and he too offered the `Id prayer before the sermon and then delivered the sermon before the people and said, "Allah's Messenger (ﷺ) has forbidden you to eat the meat of your sacrifices for more than three days
Reference: Bukhari 5573