Al-Kāfi - The Book of Marriage

Al-Kāfi - The Book of Marriage Chapter: Meaning of Milk from Impregnating Agent (the Father) ِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ وَعَلِيُّ بْنُ إِبْرَاهِي٠َ عَنْ أَبِيهِ عَنْ أَحْ٠َّدِ بْنِ أَبِي نَصْرٍ قَالَ سَأَلْتُ أَبَا الْحَسَنِ (عَلَيْهِ السَّلا٠ْرَأَةٍ أَرْضَعَتْ جَارِيَةً وَلِزَوْجِهَا ابْنٌ ٠ِنْ غَيْرِهَا أَيَحِلُّ لِلْغُلا٠ِ ابْنِ زَوْجِهَا أَنْ يَتَزَوَّجَ الْجَارِيَةَ الَّتِي أَرْضَعَتْ فَقَالَ اللَّبَنُ لِلْفَحْلِ.

He (the Imam) said, ‘The milk is from ‘impregnating agent’ her husband.’” حسن كالصحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (20/209))