It is permissible to share in the sacrifice, and a camel or a cow is sufficient for seven people

Jabir b. 'Abdullah (Allah be pleased with them) reported: We joined Allah's Apostle (may pea, @. e be upon him) in Hajj and Umra and seven persons shared in the sacrifice of an animal. A person said to Jabir (Allah be pleased with him): Can seven persons share in the sacrifice of al-Badnah (a camel) as he shares in al- Jazur (a cow)? He, (Jabir) said: It (al-Jazur) is nothing but one among the budun. Jabir was present at Hudaibiya and he said: We sacrificed on that day seventy camel, and seven men shared in each sacrifice (of camel).