Musannaf Ibn Abi Shayba 1:530

Al-Fadl ibn Dukayn narrated to us, from Ibrahim, from Ibn Isma'il, from al-Zuhri, from Ja'far ibn 'Amr ibn Umayyah al-Damri, from his father, that the Prophet (peace and blessings of Allah be upon him) cut a piece from the shoulder of a sheep, then he prayed and did not perform ablution.