"and fast, it is better for you, if only you knew" [al-Baqarah, 2:184]
The Prophet said that your Lord said, "Every (sinful) deed can be expiated; and the fast is for Me, so I will give the reward for it; and the smell which comes out of the mouth of a fasting person, is better in Allah's Sight than the smell of musk." [Bukhari]
The Prophet said, "Allah said: The Fast is for Me and I will give the reward for it, as he (the one who observes the fast) leaves his sexual desire, food and drink for My Sake. Fasting is a screen (from Hell) and there are two pleasures (moments of happiness or joys) for a fasting person, one at the time of breaking his fast, and the other at the time when he will meet his Lord. And the smell of the mouth of a fasting person is better in Allah's Sight than the smell of musk." [Bukhari]
The Prophet said, "(Allah said), 'Every good deed of Adam's son is for him except fasting; it is for Me. and I shall reward (the fasting person) for it.' Verily, the smell of the mouth of a fasting person is better to Allah than the smell of musk." [Bukhari]
He also said: "Every action of the son of Adam is given manifold reward, each good deed receiving ten times its like, up to seven hundred times. Allah the Most High said: 'Except for fasting, for it is for Me and I will give recompense for it, he leaves off his desires and his food for Me'. For the fasting person there are two times of joy; a time of joy when he breaks his fast and a time of joy when he meets his Lord, and the smell coming from the mouth of the fasting person is better with Allah than the smell of Musk." [Muslim]
`Abdullah Ibn `Amr said : The Messenger of Allah, salla Allahu alaihi wa salam said : The fast most loved by Allah is the fast of Dawood and the most loved prayer is the prayer of Dawood. He used to sleep half the night, pray for a third of the night, and then sleep during the last sixth of the night. He would also fast one day and then eat on the next. [Ahmad]
'Aisha reported that the Messenger of Allah, salla Allahu alaihi wa salam, used to fast till one would say that he would never stop fasting, and he would abandon fasting till one would say that he would never fast. I never saw Allah's Messenger fasting for a whole month except the month of Ramadan, and did not see him fasting in any month more than in the month of Sha'ban. [Bukhari]
Jabir, radhiya Allahu `anhu relates that the Messenger of Allah, salla Allahu alaihi wa sallam said :" In every day and every night, during the month of Ramadan, there are people to whom Allah grants freedom from the Fire, and there is for every Muslim a supplication which he can make and will be granted". [al-Bazzaar, Ahmad and Ibn Majah; Sahih]
Abu Hurairah reported that the Prophet, salla Allahu alaihi wa sallam, said: "There are three people whose supplications are not rejected: the fasting person when he breaks the fast, the just ruler and the supplication of the oppressed". [Tirmithi, Ibn Majah and Ibn Hibban]
`Abdullah Ibn `Amr Ibn al-`Aas also reported that the Messenger of Allah, salla Allahu alaihi wa sallam, said: "Indeed there is for the fasting person, when he breaks his fast, a supplication which is not rejected". [Ibn Majah, al-Hakim and others; Sahih]
The best supplication is the one authentically reported from the Prophet, salla Allahu alaihi wa sallam, that he used to say when breaking his fast : "Thahaba aDh-Dhama'u wabtallatil-`urooqu wa thabata-l-ajru inshaa'a Allah". Which means :The thirst is gone, the veins are moisted and the reward is certain, if Allah wills. [Abu Dawood, al-Baihaqee and others; Hasan]
Abu Hurairah reported that the Prophet salla Allahu alaihi wa sallam said : "The time between the five prayers, two consecutive Friday Prayers, and two consecutive Ramadan are expiations for all that has happened during that period, provided that one has avoided the grave (major) sins." [Muslim]
Abu Huraira narrated that Allah's Messenger said : "Whoever observes fasts during the month of Ramadan out of sincere faith, and hoping to attain Allah's rewards, then all his past sins will be forgiven." [Bukhari]
"Whoever establishes prayers during the nights of Ramadan (and that is called Qiyam) faithfully out of sincere faith and hoping to attain Allah's rewards (not for showing off), all his past sins will be forgiven. [Bukhari]
Abu Hurairah also narrated that the Prophet, salla Allahu alaihi wa sallam, climbed upon the mimbar (pulpit) and said: "Aameen [O Allah grant it], aameen, aameen". So it was said, "O Messenger of Allah, you climbed upon the mimbar and said : "aameen, aameen, aameen"? So he said :"Jibraa'eel, `alaihi assalam, came to me and said, 'Whoever reaches the month of Ramadan and does not have [his sins] forgiven and so enters Fire, then may Allah distance him, say aameen". So I said "aameen". [Ibn Khuzaimah, Ahmad and al-Baihaqui : Sahih]
Hudhaifah Ibn al-Yamaan reported that the Prophet, salla Allahu alaihi wa sallam, said: "The evils caused for a man through his family, wealth and neighbor are expiated by prayer, fasting and charity." [Bukhari and Muslim]
Ibn Hibban narrated that the Prophet said, what translated means, "If a woman prayed the five prayers, fasted in Ramadan, protected her honor and obeyed her husband; then she will be told (on the Day of Judgment): enter Paradise from any of its (eight) doors.
Abu Umamah reported: "I came to the Messenger of Allah and said: 'Order me to do a deed that will allow me to enter Paradise.' He said: 'Stick to fasting, as there is no equivalent to it.' Then I came to him again and he said: 'Stick to fasting."' [Ibn Hibban, an-Nasa'i, and al-Hakim: Sahih]