Musannaf Ibn Abi Shayba 3:925

Muhammad ibn Mus’ab narrated to us, from al-Awza’i, from Abu al-Najashi, from Rafi’ ibn Khadij, who said: We used to pray with the Messenger of Allah (may Allah bless him and grant him peace), then we would slaughter a camel and divide it into ten parts. Then we would cook it and eat well-cooked meat before we prayed the Maghrib prayer.