Al-Kāfi - Volume 4 > The Excellence of Fast and Fasting
Hadith #11

11ـ عَلِيٌّ عَنْ هَارُونَ بْنِ مُسْلِمٍ عَنْ مَسْعَدَةَ عَنْ أَبِي عَبْدِ الله عَنْ آبَائِهِ (عَلَيْهِم السَّلاَم) أَنَّ النَّبِيَّ (صلَّى اللهُ عَلَيْهِ وَآلِه) قَالَ إِنَّ الله عَزَّ وَجَلَّ وَكَّلَ مَلائِكَتَهُ بِالدُّعَاءِ لِلصَّائِمِينَ وَقَالَ أَخْبَرَنِي جَبْرَئِيلُ (عَلَيْهِ السَّلاَم) عَنْ رَبِّهِ أَنَّهُ قَالَ مَا أَمَرْتُ مَلائِكَتِي بِالدُّعَاءِ لأَحَدٍ مِنْ خَلْقِي إِلاَّ اسْتَجَبْتُ لَهُمْ فِيهِ.

11. Ali has narrated from Harun ibn Muslim from Mas’adah who has said the following: “Abu ‘Abd Allah has narrated from his ancestors, ‘Alayhim al-Salam, that the Holy Prophet, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, has said, ‘Allah, the Most Majestic, the Most Glorious, has assigned His angels to pray in favor of the fasting people. He (the Holy Prophet) has said, ‘ Jibril has informed me from his Lord who has said, “When I command My angels to pray in favor of someone, I do not leave their prayers without acceptance.’””