Ikrama عكرمة · The Book on Fasting

the Messenger of Allah said: "Do not fast before Ramadan. Fast with its sighting, and break fast with its sighting, and if it is obscured from you, then complete thirty days."

"A Bedouin came to the Prophet and said: 'I have seen the crescent.' So he said: 'Do you testify that none has the right to be worshipped but Allah? Do you testify that Muhammad is the Messenger of Allah?' He said: 'Yes.' So he said: 'O Bilal! Announce to the people that they should fast tomorrow.'"

"The Prophet broke (the fast) of Arafah, Umm Fadl sent him some milk to drink."

"the Messenger of Allah was cupped while he was fasting and in Ihram."