Musnad Abu Ya'la al-Mawsili 148:69

Abu Bakr ibn Abi Shaybah narrated to us, Waki' narrated to us, from Hisham, from Yahya ibn Abi Kathir, from Anas, who said: When the Messenger of Allah (peace and blessings of Allah be upon him) would eat with a household, he would say: "May the fasting ones break their fast with you, may the righteous eat your food, and may the angels send blessings upon you."