Ibn Ishaq محمد بن إسحاق بن يسار‎ · The Book of Fasting

"When the month of Ramadan begins, the gates of Paradise are opened and the gates of Hell are shut, and the devils are fettered."

'When Ramadan begins, the gates of Paradise are opened, the gates of Hell are closed, and the devils are fettered."

"The Messenger of Allah said: 'Fasting is a shield."

"Al-Hakam said to me: 'I heard it from him forty years age; Then Al-Hakam said: 'And Maimum bin Abi Shabib narrated it to me from Muadh bin Jabal." (Sahih

"I asked the Messenger of Allah about fasting while traveling. He said: 'If you wish to fast then fast, and if you wish not to fast then do not fast."'

"I asked the Messenger of Allah about fasting while traveling. He said: 'If you wish to fast then fast, and if you wish not to fast then do not fast."'

"I asked 'Aishah about the fasting of the Messenger of Allah. She said: "The Messenger of Allah used to fast until we said: He is going to (continue to) fast, and he used not to fast until we said: He is not going to, and he did not fast for a whole month from the time he came to Al-Madinah, apart from Ramadan."'

"The month which the Messenger of Allah most liked to fast was Shaban; indeed he used to join it to Ramadan."

"The Messenger of Allah said: "The best of fasting is the fast of Dawud, peace be upon him. He used to fast for one day and break his fast for one day."' 'Ata said: "someone who heard him told me that Ibn 'Umar (said) that the Prophet said: 'Whoever fasts every day of his life, then he has not fasted."

"The Messenger of Allah commanded me to sleep after praying Witr, to perform Ghusl on Friday and to fast three days of each month." (Sahih).