Chapter on Conditional Emancipation (Tadbir)
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 1|Chapter 47
وَ رَوَى عَاصِمٌ عَنْ أَبِي بَصِيرٍ قَالَ: سَأَلْتُهُ عَنِ اَلْعَبْدِ وَ اَلْأَمَةِ يُعْتَقَانِ عَنْ دُبُرٍ فَقَالَ "لِمَوْلاَهُ أَنْ يُكَاتِبَهُ إِنْ شَاءَ وَ لَيْسَ لَهُ أَنْ يَبِيعَهُ إِلاَّ أَنْ يَشَاءَ اَلْعَبْدُ أَنْ يَبِيعَهُ مُدَّةَ حَيَاتِهِ وَ لَهُ أَنْ يَأْخُذَ مَالَهُ إِنْ كَانَ لَهُ مَالٌ ".
Asim narrated from Abu Basir, who said: I asked him about a male or female slave who had been made mudabbar (to be freed after the master's death). Imam عليه السلام said: "The master may enter into a mukataba (a contract of emancipation in exchange for payment) with the slave if he wishes. However, he cannot sell the slave unless the slave agrees to be sold for the duration of the master's life. The master is also entitled to take any wealth the slave possesses, if the slave has wealth."
- Ṣaḥīḥ al-Faqīh