Musnad Ahmad 32:2010

'Abdullah narrated to us, Muhammad ibn Bashar narrated to us, Sa'id ibn 'Amir narrated to us, Shu'bah narrated to us, from Qatadah, from Anas, who said: The Messenger of Allah (peace and blessings of Allah be upon him) used to joke with us a great deal, to the extent that he said to a younger brother of mine: "O Abu 'Umayr, what did the *nughayr* (small bird) do?"