The Prophet ﷺ said, "The breath of one who is fasting is more pleasing to Allah than the scent of musk."
حدثنا عبد الرحمن قال حدثنا داود بن قيس عن موسى بن يسار
عن النبي ﷺ قال لخلوف فم الصائم أطيب عند الله من ريح المسك
Its isnad is sahih. It was mentioned previously at . Dawud bin Qays al-Farra is trustworthy and virtuous, and Musa bin Yasar al-Mutallibi is also trustworthy.