It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that he said: "With the Messenger of Allah (peace and blessings be upon him) we slaughtered a camel (as a sacrifice) on behalf of seven people." We asked Sayyiduna Jabir (may Allah be pleased with him): "And a cow?" He said: "It is the same as it (the camel)."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ibn Jurayj, from Amr bin Dinar, except Yahya bin Ayyub."