5272 - وَ رَوَى اِبْنُ مَحْبُوبٍ عَنْ أَبِي أَيُّوبَ عَنْ مُحَمَّدِ بْنِ مُسْلِمٍ قَالَ: سَأَلْتُ أَبَا جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ عَنْ مُكَاتَبٍ قَتَلَ رَجُلاً خَطَأً فَقَالَ "إِنْ كَانَ مَوْلاَهُ حِينَ كَاتَبَهُ اِشْتَرَطَ عَلَيْهِ أَنَّهُ إِنْ عَجَزَ فَهُوَ رَدٌّ إِلَى اَلرِّقِّ فَهُوَ بِمَنْزِلَةِ اَلْمَمْلُوكِ يُدْفَعُ إِلَى أَوْلِيَاءِ اَلْمَقْتُولِ فَإِنْ شَاءُوا اِسْتَرَقُّوا وَ إِنْ شَاءُوا بَاعُوا وَ إِنْ كَانَ مَوْلاَهُ حِينَ كَاتَبَهُ لَمْ يَشْتَرِطْ عَلَيْهِ وَ كَانَ قَدْ أَدَّى مِنْ مُكَاتَبَتِهِ شَيْئاً فَإِنَّ عَلِيّاً عَلَيْهِ اَلسَّلاَمُ كَانَ يَقُولُ "يُعْتَقُ مِنَ اَلْمُكَاتَبِ بِقَدْرِ مَا أَدَّى مِنْ مُكَاتَبَتِهِ وَ عَلَى اَلْإِمَامِ أَنْ يُؤَدِّيَ إِلَى أَوْلِيَاءِ اَلْمَقْتُولِ بِقَدْرِ مَا أُعْتِقَ مِنَ اَلْمُكَاتَبِ وَ لاَ يُبْطَلُ دَمُ اِمْرِئٍ مُسْلِمٍ " وَ أَرَى أَنْ يَكُونَ بِمَا بَقِيَ عَلَى اَلْمُكَاتَبِ مِمَّا لَمْ يُؤَدِّهِ رِقّاً لِأَوْلِيَاءِ اَلْمَقْتُولِ يَسْتَخْدِمُونَهُ حَيَاتَهُ بِقَدْرِ مَا بَقِيَ عَلَيْهِ وَ لَيْسَ لَهُمْ أَنْ يَبِيعُوهُ".
Hadith.5272 - Ibn Mahbub narrated from Abu Ayyub from Muhammad bin Muslim who said:
I asked Abu Jafar Imam Muhammad ibn Ali Al-Baqir 
about a mukatab (a slave who has a contract for gradual emancipation) who unintentionally killed a man.
Imam said: "If his master, when drafting the emancipation contract, stipulated that if he fails to fulfill the payment, he would return to slavery, then he is treated like a slave and handed over to the heirs of the murdered person.
If they wish, they may enslave him, and if they wish, they may sell him.
But if his master, when drafting the contract, did not make such a stipulation and the mukatab had already paid part of the contract amount, then Imam Ali ibn Abi Talib used to say,
'He is freed in proportion to what he has paid of his contract, and it is upon the Imam to pay the heirs of the murdered person an amount equivalent to the portion of freedom the mukatab had earned. The blood of a Muslim must not be wasted.'
I also believe that regarding the remaining unpaid portion of the contract, the mukatab should remain as a slave to the heirs of the murdered person, serving them for the rest of his life in proportion to what remains of his contract, but they are not permitted to sell him."
