Sayyidah Aishah Siddiqah (may Allah be pleased with her) narrates: The Prophet (peace and blessings be upon him) came home and asked: O Aishah, is there anything to eat? I brought him a piece of bread. The Prophet (peace and blessings be upon him) put it in his mouth and then said: O Aishah, has anything of it entered my stomach? The ruling on a fasting person's kiss is likewise. The fast is broken by what goes in, not by what comes out.
Abu Ya'la recorded it, and its chain contains a narrator whom I do not know.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصيام / 4970