(43) CHAPTER. When the Imam is called for As-Salat (the prayer) while he has in his hands something to eat.
Narrated Ja`far bin `Amr bin Umaiya: My father said, I saw Allah's Apostle eating a piece of meat from the shoulder of a sheep and he was called for the prayer. He stood up, put down the knife and prayed but did not perform ablution.''
Authentic