Musnad Ahmad 759:4

Zakariya ibn 'Adi narrated to us, 'Ubayd Allah ibn 'Amr narrated to us, from Zayd ibn Abi Unaysah, from Qays ibn Muslim, from 'Abd al-Rahman ibn Abi Layla, from his father, who said: I witnessed the conquest of Khaybar with the Messenger of Allah, may Allah bless him and grant him peace. When they were defeated, we fell upon their baggage, and the people took whatever they found of household goods. It was not long before the cooking pots began to boil. He said: The Messenger of Allah, may Allah bless him and grant him peace, ordered the pots, and they were overturned. He then divided [the spoils] among us, and he assigned one sheep for every ten men.