It is narrated from Hazrat Anas bin Malik (may Allah be pleased with him). He says that on the day of the Battle of Khaybar, people slaughtered donkeys. When the meat began to boil in the pots, the Prophet (peace and blessings be upon him) ordered Hazrat Abu Talha, so he announced: Indeed, Allah Almighty and His Messenger (peace and blessings be upon him) have forbidden you from (eating) domesticated donkeys, because they are impure. Thus, the pots were overturned.