Abu Hurairah and Abu Saeed Khudri reported,

The Messenger of Allah ﷺ said, "Allah عز وجل says, 'Fasting is for Me, and I Myself reward it.' The one who fasts has two moments of joy. When he breaks his fast, he rejoices, and when he meets Allah, he rejoices. By the One in whose hand is the soul of Muhammad, the breath of the fasting person is more fragrant to Allah than the scent of musk."

Azami 4395

Sahih

عن أبي هريرة، وأبي سعيد قالا

قال رسول الله ﷺ: إن الله عز وجل يقول: إن الصوم لي وأنا أجزي به، إن للصائم فرحتين. إذا أفطر فرح، وإذا لقي الله فرح، والذي نفس محمد بيده لخلوف فم الصائم أطيب عند الله من ريح المسك.

الأعظمي 4395صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Fasting
Chapter
Voluntary fasting and encouragement to do it
Section
Encouragement to fast in general and what was narrated about its virtue
Numbering
Jami al-Kamil 4395 (2nd edition)
Azami 4395