by Imam Muslim, translation by Abdul Hamid Siddiqui , Volume: The Book of Sacrifices (Kitab Al-Adahi)
Chapter: IT WAS NOT PERMISSIBLE TO EAT THE FLESH OF SACRIFICIAL ANIMALS BEYOND THREE DAYS AT THE BEGINNING OF ISLAM, BUT THIS PROHIBITION WAS ABROGATED, AND NOW IT IS PERMISSIBLE
Abu Ubaid reported: I was with 'Ali b. Abi Talib on the occasion of the 'Id day. He started with the 'Id prayer before delivering the sermon, and said: Allah's Messenger (may peace be upon him) forbade us to eat the flesh of our sacrificial animals beyond three days.
Abu 'Ubaid, the freed slave of Ibn Azhar, reported that he said 'Id (prayer) with Umar b. al-Khattab, and then said the 'Id (prayer) with 'Ali b. Abu Talib. He (the narrator further) reported: He led us in prayer before delivering the sermon and then addressed the people saying: Allah's Messenger (may peace be upon him) has forbidden you to eat the flesh of your sacrificial animals beyond three nights, so do not eat that.
This hadith has been narrated on the authority of Zuhri with the same chain of transmitters.
Ibn 'Umar reported kllah's Apostle (may peace be upon him) having said: None of you shculd eat the flesh of his sacrificial animal beyond three days.
This hadith has been narrated on the authority of Ibn Umar through another chain of transmitters.