Musnad Abu Ya'la al-Mawsili 208:2

Zahmūyah narrated to us, Ibrāhīm ibn Sa‘d narrated to us, he said: Ibn Shihāb narrated it to us from Ja‘far ibn ‘Amr ibn Umayyah al-Ḍamrī, from his father, that he saw the Messenger of Allah (may Allah bless him and grant him peace) eating from a shoulder [of a sheep], gnawing at it. Then he came to the prayer and prayed, and he did not perform ablution.