"Allah sent down His comfort..." (9:40)
Al-Kāfi|Volume 8|Book 1|Chapter 570
مُحَمَّدٌ عَنْ أَحْمَدَ عَنِ ابْنِ فَضَّالٍ عَنِ الرِّضَا (عليه السلام) فَأَنْزَلَ اللَّهُ سَكِينَتَهُ عَلَى رَسُولِهِ وَ أَيَّدَهُ بِجُنُودٍ لَمْ تَرَوْهَا قُلْتُ هَكَذَا قَالَ هَكَذَا نَقْرَؤُهَا وَ هَكَذَا تَنْزِيلُهَا.
571. Muhammad narrated from Ahmad, from Ibn Fadhal, from Al-Ridha عليه السلام: "So Allah sent down His tranquility upon His Messenger and supported him with armies that you did not see." I said: "Is this how we read it?" He said: "Yes, this is how we read it, and this is how it was revealed."
- Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (16/566)
- Ṣaḥīḥ al-Kāfī