Salim narrates from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) "forbade eating the meat of sacrifices after three days." Salim said: Abdullah bin Umar (may Allah be pleased with them both) would not eat the meat of sacrifices beyond three days.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19206