What Does the Hadith Say About Virtues of Fasting?

Narrated Abu Wail from Hudhaifa: Umar asked the people, "Who remembers the narration of the Prophet about the affliction?" Hudhaifa said, "I heard the Prophet saying, 'The affliction of a person in his property, family and neighbors is expiated by his prayers, fasting, and giving in charity." 'Umar said, "I do not ask about that, but I ask about those afflictions which will spread like the waves of the sea." Hudhaifa replied, "There is a closed gate in front of those afflictions." 'Umar asked, "Will that gate be opened or broken?" He replied, "It will be broken." 'Umar said, "Then the gate will not be closed again till the Day of Resurrection." We said to Masruq, "Would you ask Hudhaifa whether 'Umar knew what that gate symbolized?" He asked him and he replied "He ('Umar) knew it as one knows that there will be night before tomorrow, morning.

'Narrated Abu Huraira: Allah's Apostle said, "Whoever gives two kinds (of things or property) in charity for Allah's Cause, will be called from the gates of Paradise and will be addressed, 'O slaves of Allah! Here is prosperity.' So, whoever was amongst the people who used to offer their prayers, will be called from the gate of the prayer; and whoever was amongst the people who used to participate in Jihad, will be called from the gate of Jihad; and whoever was amongst those who used to observe fasts, will be called from the gate of Ar-Raiyan; whoever was amongst those who used to give in charity, will be called from the gate of charity." Abu Bakr said, "Let my parents be sacrificed for you, O Allah's Apostle! No distress or need will befall him who will be called from those gates. Will there be any one who will be called from all these gates?" The Prophet replied, "Yes, and I hope you will be one of them."

Narrated Abu Huraira: 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."

Narrated 'Alqama: While I was walking with 'Abdullah he said, "We were in the company of the Prophet and he said, 'He who can afford to marry should marry, because it will help him refrain from looking at other women, and save his private parts from looking at other women, and save his private parts from committing illegal sexual relation; and he who cannot afford to marry is advised to fast, as fasting will diminish his sexual power."