What did the Prophet Muhammad (saw) do when he was called for prayer while he was taking a piece of (cooked) mutton from the shoulder region?
 Narrated Ja`far bin `Amr bin Umaiya:                     My father said, "I saw Allah's Apostle taking a piece of (cooked) mutton from the shoulder region and then he was called for prayer. He put his knife down and prayed without repeating ablution."