Volume 4 · Book 52 · Hadith 173
Narrated Umaiya Ad-Damri: I saw the Prophet eating of a shoulder (of a sheep) by cutting from it and then he was called to prayer and he prayed without repeating his ablution.
— Sahih Bukhari, Volume 4, Book 52: Fighting for the Cause of Allah (Jihaad), Hadith #173