Musnad Abu Ya'la al-Mawsili 106:45

Zakariya ibn Yahya al-Wasiti narrated to us, Sharik narrated to us, from Abu Ishaq, from al-Bara’ who said: The Messenger of Allah, peace and blessings of Allah be upon him, passed by us while our pots were boiling with the meat of donkeys. He ordered us to overturn them, so we overturned them.