Ja'far bin 'Amr bin Umayya جعفر بن عمرو بن أمية · The Book of Fasting

"The Messenger of Allah went out to Makkah in the year of the Conquest in Ramadan. He fasted until he reached Kura Al-Ghamim, and the people fast, so he called for a vessel of water after 'Asr and drank it while the people were looking on. Then some of the people broke their fast and some continued to fast. He heard that some people were still fasting and he said: 'Those are the disobedient ones.