Sayyiduna Jabir bin Abdullah al-Ansari (may Allah be pleased with him) says: At Hudaybiyah, we slaughtered with the Messenger of Allah (peace and blessings be upon him) a camel on behalf of seven and a cow on behalf of seven.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19234