Musnad Ahmad 276:2

Yazid ibn Abd Rabbih narrated to us, he said: Al-Walid ibn Muslim narrated to us, from Wahshi ibn Harb, from his father, from his grandfather, that a man said to the Prophet, peace and blessings of Allah be upon him: "We eat and we are not satisfied." He said: "Perhaps you eat separately. Gather together for your food, and mention the name of Allah over it; it will be blessed for you in it."