Musannaf Ibn Abi Shaybah

Hazrat Abdullah bin Abi Sulaith narrates from his father, Hazrat Abu Sulaith — who is a Badri companion — that he said: The prohibition from the Messenger of Allah (peace and blessings be upon him and his family) regarding the meat of donkeys reached us while we were at the place of Khaybar. And the pots were boiling with the meat of donkeys. So we overturned those pots upside down.