It has also been narrated by Abu Hurayrah Radi Allahu anhu that the Beloved Messenger of Allah Salla Allahu ta’ala ‘alayhi wa Sallam said:
Allah Mighty and Majestic says, ‘Every action of the son of Adam belongs to him except the fast. It is Mine, and I repay him for it.’ Fasting is a protection. When one of you has a day of fasting, he should then speak neither obscenely nor too loudly; and if someone seeks to curse him or fight with him, let him say, ‘I am fasting.’ By Him in whose hand is the soul of Muhammad Salla Allahu ta’ala ‘alayhi wa Sallam, the smell of the mouth of the one who fasts is more delectable to Allah than the scent of musk. The one who fasts has two joys in which to delight: when he breaks his fast, he rejoices; and when he meets his Lord, he rejoices in his fast.
[Muslim]
Allah Mighty and Majestic says, ‘Every action of the son of Adam belongs to him except the fast. It is Mine, and I repay him for it.’ Fasting is a protection. When one of you has a day of fasting, he should then speak neither obscenely nor too loudly; and if someone seeks to curse him or fight with him, let him say, ‘I am fasting.’ By Him in whose hand is the soul of Muhammad Salla Allahu ta’ala ‘alayhi wa Sallam, the smell of the mouth of the one who fasts is more delectable to Allah than the scent of musk. The one who fasts has two joys in which to delight: when he breaks his fast, he rejoices; and when he meets his Lord, he rejoices in his fast.
[Muslim]