The Sufficient (Vol 3) · Hadith 2064 (#Ḥadīth #4)
Chapter 24 | Zakat on Wealth of Slaves, al-Mukatib and the Insane People
4ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ خَالِدٍ عَنْ أَبِي الْبَخْتَرِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ لَيْسَ فِي مَالِ الْمُكَاتَبِ زَكَاةٌ.
4. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn Khalid from abu ibn al-Bakhtariy who has said the following: “Abu ‘Abd Allah , has said, ‘Zakat is not due on the assets of al-Mukatib (a slave who has contracted his freedom in exchange for a certain amount of payment to his owner).”’
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).