Ubaidullah bin 'Umar bin Hafs عبيد الله بن عمر بن حفص بن عاصم · The Book of Fasting

"the Messenger of Allah said: 'Fast when you see it and stop fasting when you see it, and if it is obscured from you (too cloudy), then count it as thirty (days). "'

: "The Messenger of Allah said: 'Fast when you see it and stop fasting when you see it, and if it is obscured from you (too cloudy), then count it as thirty (days).'"

"Abu Hurairah told me that the Messenger of Allah said: 'Whoever spends the nights of Ramadan in prayer (Qiyam) out of faith and in the hope of reward, he will be forgiven his previous sins, and whoever spends the night of Lailat Al-Qadr in prayer out of faith and in the hope of reward, he will be forgiven his previous sins."'

"I came to the Prophet to discuss something and he was eating breakfast. He said: 'Come and eat.' I said: 'I am fasting.' He said: 'Come and I will tell you about fasting. Allah has waived half of prayer and fasting from the traveler, and he has granted a concession to pregnant women and the sick."'

"The Messenger of Allah came one day and said: 'Do you have any food?' I said: 'No.' He came in to me on another occasion, and I said: 'O Messenger of Allah, we have been given some Hais.' He said: "Then I will break my fast today, although I had started my day fasting."'

"There is no fast for one who does not intend (to fast) before dawn."

"There is no fast for the one who does not intend to fast before dawn." Malik bin Anas narrated it in Mursla from.

"The Messenger of Allah used to fast three days of every month: the Monday and Thursday of the first week and the Monday of the following week."

"I entered upon the Mother of the Believers and heard her say: 'The Messenger of Allah used to fast three days of each month: The first Monday of the month, then Thursday, then the following Thursday."