It is narrated from Ali (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said: "None of you should eat from his sacrificial meat after three days."
Hadith Referenceمسند الإمام الشافعي / كتاب العيدين والأضاحي والاستسقاء / 507
Hadith Takhrijاخرجه البخاري، الأضاحي، باب ما يؤكل من لحوم الأضاحي وما يتزود منها (5573) ومسلم، الأضاحي، باب بيان ما كان من النهى عن أكل لحوم الأضاحي بعد ثلاث في اول الاسلام .... الخ (1969)۔
Abu Ubaid narrates from the freed slave of Ibn Azhar, who states: I was present with Ali bin Abi Talib (may Allah be pleased with him) on the occasion of Eid, and I heard him say: None of you should eat from the meat of his sacrifice after three days.
Hadith Referenceمسند الإمام الشافعي / كتاب العيدين والأضاحي والاستسقاء / 508
Hadith Takhrijاسناده صحيح اخرجه البيهقي : 290/9 ، وفى المعرفة السنن والآثار له (5677)۔