Mahmud bin Ghaylan محمود بن غيلان العدوي مولاهم أبو أحمد · The Book of Fasting

"The Messenger of Allah said: 'The difference between our fasting and the fasting of the people of the Book, is eating Sahur."' '

"Fasting is a shield against the Fire. Whoever starts the day of fasting, let him not act in an ignorant manner during that day. If anyone treats him in an ignorant maner, let him not insult him or curse him, rather let him say: "I am fasting.' By the One in whole hand is the soul of Muhammad, the smell that comes from the mouth of a fasting person is better before Allah than the fragrance of musk."

"The Messenger of Allah used to fast until we said: 'He does not want to break his fast.' And he used not to fast until we said: 'He does not want to fast."'