It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said:
"Every good deed of the son of Adam will be multiplied manifold.Agood deed will be multiplied ten times up to as many as sevenhundredtimes, or as much as Allah wills. Allah says: 'Except forfasting,which is for Me and I shall reward for it. He gives up hisdesire andhis food for My sake.' The fasting person has two joys, onewhen hebreaks his fast and another when he meets his Lord. The smellthatcomes from the mouth of a fasting person is better before Allahthanthe fragrance of musk."
English reference: Vol. 1, Book 7, Hadith 1638
Arabic reference: Book 7, Hadith 1707