Al-Kāfi - The Book of Marriage

Al-Kāfi - The Book of Marriage Chapter: Marriage with Two Sisters at the Same Time: Free or Slave-girls َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َحْبُوبٍ عَنِ ابْنِ رِئَابٍ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلا٠) قَالَ قُلْتُ لَهُ الرَّجُلُ يَشْتَرِي الأخْتَيْنِ فَيَطَأُ إِحْدَاهُ٠َّ يَطَأُ الأخْرَى بِجَهَالَةٍ قَالَ إِذَا وَطِئَ الأخْرَى بِجَهَالَةٍ لَ٠ْ عَلَيْهِ الأولَى وَإِنْ وَطِئَ الأخْرَى وَهُوَ يَعْلَ٠ُ أَنَّهَا تَحْرُ٠َتَا عَلَيْهِ جَ٠14.

Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Mahbub from ibn Ri’ab from al-Halabiy who has said the following: “This is concerning my question before abu ‘Abd Allah (a.s.), about the case of a man who buys two sisters and goes to bed with one of them, then goes to bed with the other due to ignorance.

He (the Imam) said, ‘If he has gone to bed with the other due to ignorance the first one does not become unlawful for him but if he goes to bed with the other knowing that it is unlawful, both of them become unlawful for him.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (0/197))