Musnad Abu Ya'la al-Mawsili 115:267

Zuhayr narrated to us, Affan narrated to us, Aban ibn Yazid narrated to us, Qatadah narrated to us, from Anas, that the Messenger of Allah (may Allah bless him and grant him peace) never had lunch and dinner consisting of bread and meat gathered together for him, except when there were guests.