Sahih Muslim Book 003, Hadith Number 0692.
Chapter : Abrogation of the Hadith that ablution is obligatory for him who takes something cooked with the help of fire.
Ja'far b. 'Amr b. Umayya al-Damari reported on the authority of his father who said: I saw the Messenger of Allah (may peace be upon him) take slices from goat's shoulder and then eat them. He was called for prayer and he got up, leaving aside the knife, and offered prayer but did not perform ablution.