Musnad Abu Ya'la al-Mawsili 148:71

Abu Khaythama narrated to us, Yazid bin Harun narrated to us, Hisham al-Dastawa'i informed us, from Yahya bin Abi Kathir, from Anas bin Malik, who said: When the Messenger of Allah (may Allah bless him and grant him peace) would break his fast with a people, he would say: "The fasting ones have broken their fast with you, the righteous have eaten your food, and the angels have descended upon you."