The Prophet (PBUH) forbade the meat of domestic donkeys on the Day of Kheibar.

We set out with the Prophet (PBUH) to Kheibar and one of us said: O 'Amir, let us hear some of your poems. He got down and started to chant: "By Allah, Had it not been for Allah, we would not have been guided". 'Narrator said: Amir added poetry other than this, but I do not remember. The Messenger of Allah (PBUH) said: Who is this -camel- driver? They said: 'Amir ibn Al-Akwa'. He said: May Allah have mercy on him. One of us said: O Prophet of Allah, would that you let us enjoy his company longer! When people lined up, the battle started, and 'Amir ibn Al-Akwa' was struck by the blade of his own sword and died. When evening came, they lit many fires. The Messenger of Allah said: What is this fire? What are you cooking on it? They said: Domestic donkeys. He said, Pour out what is in the pots and break them. A man said: Shall we not pour out what is in them and wash them instead? He said: Or that.