Chapter 97: Oneness, Uniqueness of Allah (Tawheed)
Narrated Abu Huraira: The Prophet (ﷺ) 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)
Sahih al-Bukhari 7538