Maliks Muwatta Book 23, Hadith Number 11.

Section : Sharing Sacrificial Animals and How Many Share a Cow or Camel.

Yahya related to me from Malik that Ibn Shihab said, “The Messenger of Allah, may Allah bless him and grant him peace, only sacrificed one camel or one cow for himself and his family.”

Malik said, “I do not know which of them Ibn Shihab said.”