Al-Kāfi

Hadith 1594
marriage
3- أَحْمَدُ بْنُ مُحَمَّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ عَبْدِ اللهِ بْنِ بَحْرٍ عَنْ حَرِيزٍ عَنْ زُرَارَةَ قَالَ قُلْتُ لأبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) أَمَةٌ أَبَقَتْ مِنْ مَوَالِيهَا فَأَتَتْ قَبِيلَةً غَيْرَ قَبِيلَتِهَا فَادَّعَتْ أَنَّهَا حُرَّةٌ فَوَثَبَ عَلَيْهَا رَجُلٌ فَتَزَوَّجَهَا فَظَفِرَ بِهَا مَوْلاهَا بَعْدَ ذَلِكَ وَقَدْ وَلَدَتْ أَوْلاداً فَقَالَ إِنْ أَقَامَ الْبَيِّنَةَ الزَّوْجُ عَلَى أَنَّهُ تَزَوَّجَهَا عَلَى أَنَّهَا حُرَّةٌ أُعْتِقَ وُلْدُهَا وَذَهَبَ الْقَوْمُ بِأَمَتِهِمْ فَإِنْ لَمْ يُقِمِ الْبَيِّنَةَ أُوجِعَ ظَهْرُهُ وَاسْتُرِقَّ وُلْدُهُ.
3. Ahmad ibn Muhammad has narrated from al-Husayn ibn Sa‘id from ‘Abd Allah ibn Bahr from Hariz from Zurarah who has said the following: “This is concerning my question before abu ‘Abd Allah (a.s.), about the case of a slave girl who runs away from her masters, comes to another tribe and claims that she is free. A man in a hurry comes forward, marries her and her master then succeeds to find her out when she has already given birth to children. He (the Imam) said, ‘If he can establish testimony that he has married her as a free woman her children are free, otherwise, he has caused himself a back pain and his children become slaves.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī