Al-Kāfi - Volume 8 > Hadith
Hadith #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.

570. Muhammad, from Ahmad, from Ibn Fazzaal, who has said: Al-Reza (asws) regarding: “[9:40] So Allah sent down His tranquillity upon him and strengthened him with hosts which you did not see”. I said, ‘Like this?’ He (asws) said: ‘This is how we (asws) recite it, and this is how it was Revealed’.