Al-Kāfi - Volume 4 > The Excellence of Fast and Fasting
Hadith #8

8ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنْ مُنْذِرِ بْنِ يَزِيدَ عَنْ يُونُسَ بْنِ ظَبْيَانَ قَالَ قَالَ أَبُو عَبْدِ الله (عَلَيْهِ السَّلاَم) مَنْ صَامَ لله عَزَّ وَجَلَّ يَوْماً فِي شِدَّةِ الْحَرِّ فَأَصَابَهُ ظَمَأٌ وَكَّلَ الله بِهِ أَلْفَ مَلَكٍ يَمْسَحُونَ وَجْهَهُ وَيُبَشِّرُونَهُ حَتَّى إِذَا أَفْطَرَ قَالَ الله عَزَّ وَجَلَّ لَهُ مَا أَطْيَبَ رِيحَكَ وَرَوْحَكَ مَلائِكَتِي اشْهَدُوا أَنِّي قَدْ غَفَرْتُ لَهُ.

8. A number of our people have narrated from Sahl ibn Ziyad, from Muhammad ibn Sinan from Mundhir ibn Yazid from Yunus ibn Zabayan who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘If one, for the sake of Allah, the Most Majestic, the Most Glorious, fasts on a very hot day, causing him to experience a great deal of thirst, Allah assigns a thousand angels for his safety who wipe his face until he discontinues his fast.’ Allah, the Most Majestic, the Most Glorious, then says, ‘How fine is your fragrance and spirit! O My angels, bear witness that I have granted him forgiveness.’”