Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings be upon him) said: "O people of Madinah! Do not eat the meat of your sacrifices beyond three days." They complained to the Messenger of Allah (peace and blessings be upon him) that they had dependents and servants, so he (peace and blessings be upon him) said: "Eat, feed others, keep, and you may also store."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19217