Musnad Abu Ya'la al-Mawsili 218:2

Abu al-Rabi' al-Zahrani narrated to us, Ja'far ibn Sulayman narrated to us, from Dawud ibn Abi Hind, from Ishaq al-Hashimi, Safiyyah narrated to us, she said: The Messenger of Allah (may Allah bless him and grant him peace) entered upon me, and I brought near to him a cold shoulder [of meat], and I was scraping it for him. He ate it, then he stood and prayed.