Sahih al-Bukhari Book 73, Hadith 26
We used to salt some of the meat of sacrifice and present it to the Prophet (ﷺ) at Medina. Once he said,
"Do not eat (of that meat) for more than three days." That was not a final order, but (that year) he
wanted us to feed of it to others, Allah knows better.
The Prophet (ﷺ) said, "Whoever has slaughtered a sacrifice should not keep anything of Its meat after three days." When it was the next year the people said, "O Allah's Messenger (ﷺ)! Shall we do as we did last year?" He said, ' Eat of it and feed of it to others and store of it for in that year the people were having a hard time and I wanted you to help (the needy).
the freed slave of Ibn Azhar that he witnessed the Day of `Id-al-Adha with `Umar bin Al-Khattab. `Umar offered the `Id prayer before the sermon and then delivered the sermon before the people, saying, "O people! Allah's Messenger (ﷺ) has forbidden you to fast (on the first day of) each of these two 'Ida, for one of them is the Day of breaking your fast, and the other is the one, on which you eat the meat of your sacrifices."