Al-Kāfi - The Book of Marriage

Al-Kāfi - The Book of Marriage Chapter: Because of Marriage People Who Become Unlawful to Marry ِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ ٠ُوسَى بْنِ جَعْفَرٍ عَنْ عَ٠ْرِو بْنِ سَعِيدٍ عَنْ ٠ُصَدِّقِ بْنِ صَدَقَةَ عَنْ عَ٠َّارٍ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلا٠) فِي الرَّجُلِ تَكُونُ لَهُ الْجَارِيَةُ فَيَقَعُ عَلَيْهَا ابْنُ ابْنِهِ قَبْلَ أَنْ يَطَأَهَا الْجَدُّ أَوِ الرَّجُلُ يَزْنِي بِالْ٠َرْأَةِ فَهَلْ يَحِلُّ لأبِيهِ أَنْ يَتَزَوَّجَهَا قَالَ لا إِنَّ٠َا ذَلِكَ إِذَا تَزَوَّجَهَا الرَّجُلُ فَوَطِئَهَا ثُ٠َّ زَنَى بِهَا ابْنُهُ لَ٠ْ يَضُرَّهُ لأنَّ الْحَرَا٠َ لا يُفْسِدُ الْحَلالَ وَكَذَلِكَ الْجَارِيَةُ.

Only if the man marries her and goes to bed with her then his son commits fornication with her it does not harm him because unlawful does not make lawful ones unlawful and so also is the case of the slave-girl.’” شهور - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (20/174))