Sahih Bukhari
Sahih Bukhari Volume 001, Book 004, Hadith Number 207.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 04. Ablutions (Wudu')
Narated By 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."