Ibrahim bin Y'aqub bin Ishaq إبراهيم بن يعقوب بن إسحاق · The Book of Fasting

"while we were with the Messenger of Allah, sitting in the Masjid, a man entered on a camel. He made it kneel in the Masjid, then he hobbled it. Then he said; 'Which of you is Muhammad?' He was reclining among them, and we said to him: 'This white man who is reclining.' The man said to him: 'O son of 'Abdul-Muttalib.' The Messenger of Allah said to him: 'I have answered you.' The man said: 'O Muhammad, I am…

"I came to Ash-Sham. He said: "I came to Ash-Sham and complete her errand. Then the new crescent of Ramadan was sighted while I was in Ash-Sham. I saw the new crescent on the night of Friday, then I came to Al-Madinah at the end of the month. 'Abdullah bin 'Abbas asked me about the sighting of the moon and said: ' When did you see it?' I said: 'We saw it on the night of Friday.' He said; 'You…

"The Messenger of Allah said: 'Whoever among you can afford to get married, let him do so, and whoever cannot afford it should fast, for it will be a restraint (Wija) for him."'

"The Messenger of Allah: 'There is no worshipper who fasts a day in the cause of Allah, but Allah, the most high, will separate (a distance of) seventy autumns between his face and the fire in return for that day."'