Man Lā Yaḥḍuruh al-Faqīh
Hadith 673487 - وَ رَوَى جَمِيلُ بْنُ دَرَّاجٍ عَنْ مِهْزَمٍ قَالَ : سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنِ اَلْمُكَاتَبِ يَمُوتُ وَ لَهُ وُلْدٌ فَقَالَ "إِنْ كَانَ اُشْتُرِطَ عَلَيْهِ فَوُلْدُهُ مَمَالِيكُ وَ إِنْ لَمْ يَكُنِ اُشْتُرِطَ عَلَيْهِ سَعَى وُلْدُهُ فِي مُكَاتَبَةِ أَبِيهِمْ وَ عَتَقُوا إِذَا أَدَّوْا".
Hadith.3487 - Jamil ibn Darraj narrated from Mihzam, who said:
I asked Abu Abdullah (as), about a mukatab (a slave under a contract of emancipation) who dies and leaves behind children.
Imam (as) said: "If it was stipulated in the contract that failure to complete the payments would result in returning to slavery, then his children are slaves.
However, if no such condition was stipulated, then his children must work to pay off their father's contract, and they will be freed once they complete the payments."