It was narrated from Abu Al-Ahwas that ‘Abdullah said “Allah, may He be exalted, said: ‘Fasting is for me and I shall reward for it. The fasting person has two moments of joy: When he breaks his fast and when he meets his Lord. And the smell that comes from the mouth of the fasting person is better before Allah than the fragrance of musk.”‘ ‘ (Sahih)
Narrated Abu Huraira, The Prophet (pbuh) 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.” (See Hadith No. 584)
Narrated Abu Sa’id al-Khudri (Allah be pleased with him) reported Allah’s Messenger (pbuh) as saying, He who observes fast for a day in the way of Allah He would remove his face from the Hell to the extent of seventy years’ distance.
Narrated Anas (Allah be pleased with him) reported, We were with the Apostle of Allah (pbuh) on a journey. Some of us had been observing the fast and some of us had not been fasting. We got down at a place on a hot day. Most of us had the cloth for shelter. There were also those amongst us who sheltered (themselves against the rays of the) sun with the help of their hands. The observers of the fast fell down (on account of weakness). Those who had not observed it got up and pitched tents and watered the mounts. Thereupon the Messenger of Allah (pbuh) said: The breakers of the fast have taken away the reward today.
Narrated Abu Huraira, Allah’s Messenger (pbuh) said, “It is not lawful for a lady to fast (Nawafil) without the permission of her husband when he is at home; and she should not allow anyone to enter his house except with his permission; and if she spends of his wealth (on charitable purposes) without being ordered by him, he will get half of the reward.”
An Nasai (The Book of Fasting – 156)
It was narrated that Abu Saeed Al-Khudri said “The Messenger of Allah said: ‘Whoever fasts one day in the cause of Allah, Allah will separate between his face and the fire by (a distance of) seventy autumns in return for that day.”‘ (Sahih)