Nasr bin 'Ali bin Nasr bin 'Ali · The Book of Fasting

"Do not anticipate the month until you see the crescent before it, or you complete the number of days. Then fast until you see the new moon, or you complete the number of days."

"Whoever fasts in Ramadan out of faith and in the hope of reward, he will be forgiven his previous sins." '

"The Messenger of Allah passed by my door. He said: 'Do you have anything (to eat)?' I said 'I do not have anything.' He said 'Then I am fasting.' Then he passed by my door a second time and we had been given some Hais. I brought it to him and he ate, and I was surprised. I said: 'O Messenger of Allah, you were fasting, then you ate Hais.' He said: 'Yes, O 'Aishah. The one who observes a…