Muwatta Malik 868
موطأ مالك#868SahihYahya related to me from Malik from Nafi that Abdullah ibn Urnar used to say, "The least thing that is acceptable as a sacrificial animal is a camel or a cow
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: 20:164