Sayyiduna Jabir (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) set out in Ramadan in the year of the Conquest of Makkah until he reached Kura' al-Ghamim. We also fasted with him (peace and blessings be upon him), and the fasting became hard on the people, and they were waiting to see what ruling would now come down. So he (peace and blessings be upon him) called for a cup of water after the Asr prayer and drank it while the people were watching. Then the people also broke their fast, but some did not. This reached the Messenger of Allah (peace and blessings be upon him), and he (peace and blessings be upon him) said: "These are the disobedient ones." He said it twice.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8175