Narrated by Ibn Umar (Radhiallaho anhuma):
I heard Allah’s Messenger (sallallaahu ‘alaihi wasallam) saying, “When you see the crescent (of the month of Ramadan), start fasting, and when you see the crescent (of the month of Shawwal), stop fasting; and if the sky is overcast (and you can’t see it) then regard the month of Ramadan as of 30 days.”
Sahih Al-Bukhari Vol. 3 : No. 124


Devils are chained in The month of Ramadan

Narrated by Abu Huraira (Radhiallaho anho):
Allah’s Messenger (sallallaahu ‘alaihi wasallam)said, “When the month of Ramadan starts, the gates of the heaven are opened and the gates of Hell are closed and the devils are chained.”
Sahih Al-Bukhari Vol. 3 : No. 122


The virtues of Ramadan

Narrated by Abu Huraira (Radhiallaho anho):
Allah’s Messenger (sallallaahu ‘alaihi wasallam) said “The blessed month has come to you. Allah has made fasting during it obligatory upon you. During it, the gates to Paradise are opened and the gates to hellfire are locked, and the devils are chained. There is a night [during this month] which is better than a thousand months. Whoever is deprived of its good is really deprived [of
something great].”
This is related by Ahmad, an-Nasa’i, and al-Baihaqi.


Gates of Paradise for women

Narrated by Anas ibn Malik (Radhiallaho anho):
Allah’s Messenger (sallallaahu ‘alaihi wasallam) said, “When a woman observes the five times of prayer, fasts during Ramadan, preserves her chastity and obeys her husband, she may enter by any of the gates of Paradise she wishes.”
(Al-Tirmidhi 956, Abu Nu’aym transmitted it in al-Hilyah)


The virtues of Ramadan

Narrated by Abu Sa’id al-Khudri (Radhiallaho anho):
Allah’s Messenger (sallallaahu ‘alaihi wasallam) said “Whoever fasts the month of Ramadan, obeying all of its limitations and guarding himself against what is forbidden, has in fact atoned for any sins he committed before it.”
Ahmad and alBaihaqi related this hadith with a good chain.


The virtues of Fasting

Narrated by Abdullah ibn ‘Amr (Radhiallaho anho):
Allah’s Messenger (sallallaahu ‘alaihi wasallam) said “The fast and the Qur’an are two intercessors for the servant of Allah on the Day of Resurrection. The fast will say: ‘O Lord, I prevented him from his food and desires during the day. Let me intercede for him.’ The Qur’an will say: ‘I prevented him from sleeping at night. Let me intercede for him.’ And their intercession will be accepted.”
Ahmad related this hadith with a sahih chain.


Ar-Raiyan, one of the gates of paradise

Narrated by Sahl (Radhiallaho anho):
Allah’s Messenger (sallallaahu ‘alaihi wasallam)said, “There is a gate in Paradise called Ar-Raiyan, and those who observe fasts will enter through it on the Day of Resurrection and none except them will enter through it. It will be said, ‘Where are those who used to observe fasts?’ They will get up, and none except them will enter through it. After their entry the gate will be closed and nobody will enter through it.”
Sahih Al-Bukhari Vol. 3 : No. 120


The superiority of observing fasting

Narrated by Abu Hurairah (Radhiallaho anho):
Allah’s Messenger (sallallaahu ‘alaihi wasallam)said, “Fasting is a shield (or a screen or a shelter). So, the person observing fasting should avoid sexual relation with his wife and should not behave foolishly and impudently, and if somebody fights with him or abuses him, he should tell him twice, ‘I am fasting.” The Prophet added, “By Him in Whose Hands my soul is, the smell coming out from the mouth of a fasting person is better in the sight of Allah than the smell of musk. (Allah says about the fasting person), ‘He has left hisfood, drink and desires for My sake. The fast is for Me. So I will reward (the fasting person) for it and the reward of good deeds is multiplied ten times.”
Sahih Al-Bukhari Vol. 3 : No. 118