Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: The Prophet (peace and blessings be upon him) set out from Madinah to Makkah. He was fasting until he reached Qudayd, then a vessel of milk was brought to him, and he (peace and blessings be upon him) broke his fast while on his mount. This was in Ramadan. So the people also broke their fast. Then those who had broken their fast said to those who had not: Break your fast, O disobedient ones!
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11654