Fasting and the Sack of Musk

And then he said: wa āmurukum bi-ṣ-ṣiyām — and I command you to fast. And the analogy of that is like someone walking with a sack of musk, and everyone is able to smell it. And then he said: the smell of the mouth of the person who is fasting is better in the eyes of Allah (swt) than the smell of musk.