Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) said: In the year of al-Hudaybiyah, we slaughtered with the Prophet (peace and blessings be upon him) a camel on behalf of seven people and a cow on behalf of seven people.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10192