Abdullah bin Abi Awfa · The Book of Hunting and Slaughtering

" On the Day of Khaibar, the Messenger of Allah (ﷺ) allowed us to eat the flesh of horses but he forbade us from the flesh of donkeys."

Some chicken was brought to Abu Musa and a man moved away from the people. He said: "What is the matter with you?" He said: "I saw it eating something that I consider filthy, and I swore I would not eat it." Abu Musa said: "Come and eat, for I saw the Messenger of Allah eating it." And he told him to offer an expiation for his vow (Kafarat Al-Yamin)

"We were with Abu Musa and His food was brought, including chicken. Among the people there was a man from banu Taimullah who had reddish complexion, as if he were a freed slave. He did not come close and Abu Musa said: "Come (and eat) for I saw the Messenger of All eating it"'