1818 ahadith found, page 140 of 182
Allah's Apostle said, "Allah said, 'All the deeds of Adam's sons (people) are for them, except fasting which is for Me, and I will give the reward for it.' Fasting is a shield or protection from the fire and from committing sins. If one of you is fasting, he should avoid sexual relation with his wife and quarreling, and if somebody should fight or quarrel with him, he should say, 'I am fasting.' By Him in Whose Hands my soul is' The unpleasant smell coming out from the mouth of a fasting person is better in the sight of Allah than the smell of musk. There are two pleasures for the fasting person, one at the time of breaking his fast, and the other at the time when he will meet his Lord; then he will be pleased because of his fasting."
Allah's Apostle mentioned Ramadan and said, "Do not fast unless you see the crescent (of Ramadan), and do not give up fasting till you see the crescent (of Shawwal), but if the sky is overcast (if you cannot see it), then act on estimation (i.e. count Shaban as 30 days)."
Allah's Apostle said, "The month (can be) 29 nights (i.e. days), and do not fast till you see the moon, and if the sky is overcast, then complete Shaban as thirty days."
Allah's Apostle vowed to keep aloof from his wives for one month, and he had dislocation of his leg. So, he stayed in a Mashruba for 29 nights and then came down. Some people said, "O Allah's Apostle! You vowed to stay aloof for one month," He replied, "The month is of 29 days."
When the verses were revealed, 'Until the white thread appears to you, distinct from the black thread,' I took two (hair) strings, one black and the other white, and kept them under my pillow and went on looking at them throughout the night but could not make anything out of it. So, the next morning I went to Allah's Apostle and told him the whole story. He explained to me, "That verse means the darkness of the night and the whiteness of the dawn."
When the following verses were revealed: 'Eat and drink until the white thread appears to you, distinct from the black thread' and of dawn was not revealed, some people who intended to fast, tied black and white threads to their legs and went on eating till they differentiated between the two. Allah then revealed the words, 'of dawn', and it became clear that meant night and day.
Bilal used to pronounce the Adhan at night, so Allah's Apostle? said, "Carry on taking your meals (eat and drink) till Ibn Um Maktum pronounces the Adhan, for he does not pronounce it till it is dawn.
I used to take my Suhur meals with my family and then hurry up for presenting myself for the (Fajr) prayer with Allah's Apostle.
The Prophet fasted for days continuously; the people also did the same but it was difficult for them. So, the Prophet forbade them (to fast continuously for more than one day). They said, "But you fast without break (no food was taken in the evening or in the morning)." The Prophet replied, "I am not like you, for I am provided with food and drink (by Allah)."
Aisha and Um Salama narrated, At times Allah's Apostle used to get up in the morning in the state of Janaba after having sexual relations with his wives. He would then take a bath and fast.