The rule for one who finds his father enslaved in the pre-Islamic era
1
عَنْهُ عَنْ أَبِيهِ عَنِ ابْنِ مَحْبُوبٍ عَنْ أَبِي أَيُّوبَ عَنِ الْحَارِثِ بْنِ الْمُغِيرَةِ قَالَ سَأَلْتُ أَبَا عَبْدِ اللَّهِ (عليه السلام) عَنْ رَجُلٍ أَصَابَ أَبَاهُ سَبْيٌ فِي الْجَاهِلِيَّةِ فَلَمْ يَعْلَمْ أَنَّهُ كَانَ أَصَابَ أَبَاهُ سَبْيٌ فِي الْجَاهِلِيَّةِ إِلَّا بَعْدَ مَا تَوَالَدَتْهُ الْعَبِيدُ فِي الْإِسْلَامِ وَ أُعْتِقَ قَالَ فَقَالَ فَلْيُنْسَبْ إِلَى آبَائِهِ الْعَبِيدِ فِي الْإِسْلَامِ ثُمَّ هُوَ يُعَدُّ مِنَ الْقَبِيلَةِ الَّتِي كَانَ أَبُوهُ سُبِيَ فِيهَا إِنْ كَانَ [أَبُوهُ] مَعْرُوفاً فِيهِمْ وَ يَرِثُهُمْ وَ يَرِثُونَهُ.
309. From him, from Ibn Mahboub, from Abu Ayyub, from Al-Haris Bin Al-Mugheira who said: I asked Abu Abdullah (asws) about a man whose father had been made a captive in the era of Ignorance, so he never knew that he was a son whose father was made a captive in the era of ignorance until after he had been born a slave in Al-Islam and had been freed’. So he (asws) said: ‘His lineage is to his enslaved father in Al-Islam, then he would be counted from the tribe which his father was enslaved in, that he was known to be from them, and he will inherit from them and they will inherit from him’.