Musnad Ahmad 25:1153

Abdullah ibn al-Walid narrated to us, Sufyan narrated to us, from Simak ibn Harb, from Ikrimah, from Ibn Abbas: That the Messenger of Allah (peace and blessings of Allah be upon him) performed ablution for prayer. Then one of his wives said to him: "Sit down, for the pot has finished cooking." So she handed him a shoulder [of meat], and he ate. Then he wiped his hand, and he prayed and did not perform ablution.