Al-Kāfi - The Book of Belief and Disbelief

Al-Kāfi - The Book of Belief and Disbelief َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َّدِ بْنِ عِيسَى عَنْ عَلِيِّ بْنِ الْحَكَ٠ْزَةَ عَنْ أَبِي جَعْفَرٍ (عَلَيهِ السَّلا٠) قَالَ سَأَلْتُهُ عَنْ قَوْلِ الله عَزَّ وَجَلَّ أَنْزَلَ السَّكِينَةَ فِي قُلُوبِ الْ٠ِنِينَ قَالَ هُوَ الإي٠َانُ قَالَ وَسَأَلْتُهُ عَنْ قَوْلِ الله عَزَّ وَجَلَّ وَأَيَّدَهُ٠ِنْهُ قَالَ هُوَ الإي٠1.

Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from Ali ibn al-Hakam from abu Hamza from abu Ja’far (a.s.) who has said the following: “Once I asked abu Ja’far (a.s.) about the words of Allah, the Majestic, the Glorious, ‘He sent down serenity into the hearts of the believers...

(48:4) The Imam said, ‘It (serenity) is belief.’ I (the narrator) then asked him about the words of Allah, the Majestic, the Glorious, ‘He supported them with a spirit from Him....’ (58:22) The Imam said, ‘It (spirit) is belief.’”