Musnad Abu Ya'la al-Mawsili 149:91

Abu Bakr ibn Abi Shaybah narrated to us, Abd al-Rahim ibn Sulayman narrated to us, from Hisham ibn Urwah, from his father, from Aisha, who said: They said, "O Messenger of Allah, the Bedouins bring us meat, and we do not know whether they mentioned the name of Allah over it or not." He said, "Mention the name of Allah over it yourselves, and eat."