He said, "We sacrificed with the Messenger of Allah ﷺ at Hudaybiyyah, one camel on behalf of seven people and one cow on behalf of seven people."
حدثنا القعنبي عن مالك عن أبي الزبير المكي
أنه قال نحرنا مع رسول الله ﷺ بالحديبية البدنة عن سبعة والبقرة عن سبعة
Etc., no. 350/1318.Its chain of transmission: Muslim narrated it, in the chapter "The Permissibility of Sharing in a Sacrificial Animal," from the hadith of Malik bin Anas, through his chain. It is also found in Muwatta (Yahya) 2/486.