Muwatta Malik 1039
موطأ مالك#1039SahihYahya related to me from Malik from Nafi that Abdullah ibn Umar said, "The sacrifice can be done up to two days after the Day of Sacrifice." Yahya related to me from Malik that he had heard the same from Ali ibn Abi Talib
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliMauquf Sahih
In-book reference: 23:12