Chapter on the Virtue of Fasting
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 2|Chapter 2
وَ قَالَ عَلَيْهِ اَلسَّلاَمُ: «مَنْ صَامَ لِلَّهِ عَزَّ وَ جَلَّ يَوْماً فِي شِدَّةِ اَلْحَرِّ فَأَصَابَهُ ظَمَأٌ وَكَّلَ اَللَّهُ بِهِ أَلْفَ مَلَكٍ يَمْسَحُونَ وَجْهَهُ وَ يُبَشِّرُونَهُ حَتَّى إِذَا أَفْطَرَ قَالَ اَللَّهُ عَزَّ وَ جَلَّ مَا أَطْيَبَ رِيحَكَ وَ رَوْحَكَ يَا مَلاَئِكَتِي اِشْهَدُوا أَنِّي قَدْ غَفَرْتُ لَهُ».
Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said: "Whoever fasts for the sake of Allah سبحانه وتعالى, the Almighty, on a hot day and experiences thirst, Allah سبحانه وتعالى appoints a thousand angels to wipe his face and give him glad tidings until he breaks his fast. When he breaks his fast, Allah سبحانه وتعالى, the Almighty, says: 'How pleasant is your fragrance and your soul! O My angels, bear witness that I have forgiven him.'”
- Ṣaḥīḥ al-Faqīh