A Comprehensive Compilation of Reliable Narrations · Hadith 543 (#Ḥadīth #3)

[1569/2] الكافي: محمد، عن احمد، عن ابن فضال، عن الرضا عليه السلام: فَأَنزَلَ اللَّهُ سَكِينَتَهُ على رسوله وَأَيَّدَهُ بِجُنُودٍ لَّمْ تَرَوْهَا قلت: هكذا؟ قال: هكذا نقرؤها وهكذا تنزيلها

[2/1569] al-Kafi: Muhammad from Ahmad from Ibn al-Fadhal from al-Ridha عليه السلام. (The Imam recited): “Then Allah sent down His Sakina upon His messenger and strengthened him with hosts you did not see” (9:40). I (i.e. Ibn Fadhal) said: Like this? He (i.e. the Imam) said: This is how we recite it and this is how it came down

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).