Musannaf Ibn Abi Shayba 1:546

Narrated to us Husayn, from Za'idah, from 'Abd al-'Aziz ibn Rufay', from Ibn Abi Mulaykah and 'Ikrimah, from 'A'ishah: That the Prophet, peace and blessings of Allah be upon him, would pass by the cooking pot and take from it a piece of meat (bone with meat on it). He would consume from it, then pray, and he did not perform ablution, nor did he touch water.