The Sufficient (Vol 2) · Hadith 1001 (#Ḥadīth #11)
Chapter 112 | The Major Sins
11ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنِ ابْنِ بُكَيْرٍ قَالَ قُلْتُ لأبِي جَعْفَرٍ (عَلَيهِ السَّلام) فِي قَوْلِ رَسُولِ الله (صَلَّى اللهُ عَلَيْهِ وآلِه) إِذَا زَنَى الرَّجُلُ فَارَقَهُ رُوحُ الإيمَانِ قَالَ هُوَ قَوْلُهُ وَأَيَّدَهُمْ بِرُوحٍ مِنْهُ ذَاكَ الَّذِي يُفَارِقُهُ.
11. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Faddal from ibn Bukayr who has said the following: “Once I asked abu Ja’far about the words of the Messenger of Allah, ‘When a person commits fornication the spirit of belief departs him,’ the Imam said, ‘It is mentioned in His (Allah) words, ‘He has supported them with a spirit from Him,’ that is the spirit that departs him.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).