the Messenger of Allah ﷺ said, "Allah said, 'All the deeds of Adam's sons (people) are for them, except fasting which is for Me, and I will give the reward for it.'
"Fasting is a shield or protection from the fire and from committing sins. If one of you is fasting, he should avoid sexual relation with his wife and quarreling, and if somebody should fight or quarrel with him, he should say: I am fasting."
"By Him in Whose Hands my soul is, the unpleasant smell coming out from the mouth of a fasting person is better in the sight of Allah than the smell of musk."
"There are two pleasures for the fasting person, one at the time of breaking his fast, and the other at the time when he will meet his Lord; then he will be pleased because of his fasting." (Using translation from Bukhārī 1904)
قَالَ رَسُولُ اللهِ ﷺ قَالَ اللهُ كُلُّ عَمَلِ ابْنِ آدَمَ لَهُ إِلَّا الصِّيَامَ هُوَ لِي وَأَنَا أَجْزِي بِهِ وَالصِّيَامُ جُنَّةٌ إِذَا كَانَ يَوْمُ صِيَامِ أَحَدِكُمْ فَلَا يَرْفُثْ وَلَا يَصْخَبْ فَإِنْ شَاتَمَهُ أَحَدٌ أَوْ قَاتَلَهُ فَلْيَقُلْ إِنِّي صَائِمٌ وَالَّذِي نَفْسُ مُحَمَّدٍ بِيَدِهِ لَخُلُوفُ فَمِ الصَّائِمِ أَطْيَبُ عِنْدَ اللهِ يَوْمَ الْقِيَامَةِ مِنْ رِيحِ الْمِسْكِ لِلصَّائِمِ فَرْحَتَانِ يَفْرَحُهُمَا إِذَا أَفْطَرَ فَرِحَ بِفِطْرِهِ وَإِذَا لَقِيَ رَبَّهُ فَرِحَ بِصَوْمِهِ