The Sufficient (Vol 2) · Hadith 195 (#Ḥadīth #2)
Chapter 38 | Chastity
2ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيلَ عَنْ حَنَانِ بْنِ سَدِيرٍ عَنْ أَبِيهِ قَالَ قَالَ أَبُو جَعْفَرٍ (عَلَيهِ السَّلام) إِنَّ أَفْضَلَ الْعِبَادَةِ عِفَّةُ الْبَطْنِ وَالْفَرْجِ.
2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn Isma’il from Hanan ibn Sadir from his father who has said the following: “Abu Ja’far has said, ‘The best worship is to be chaste in the matters of stomach and genital organs.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).