It is narrated from Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with them both) that when the Prophet (peace and blessings be upon him) broke his fast with a people, he would say: "Those who fast have broken their fast with you, and the angels have supplicated for mercy upon you."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13844