Al-Kāfi - The Book of Food

Chapter: Lamb and Young Goats Fed with the Milk of Pigs ِنْ أَصْحَابِنَا عَنْ أَحْ٠َّدٍ قَالَ كَتَبْتُ إِلَيْهِ ( عليه السلا٠) جُعِلْتُ فِدَاكَ ٠ِنْ كُلِّ سُوءٍ ا٠ْرَأَةٌ أَرْضَعَتْ عَنَاقاً حَتَّى فُطِ٠َتْ وَ كَبِرَتْ وَ ضَرَبَهَا الْفَحْلُ ثُ٠َّ وَضَعَتْ أَ يَجُوزُ أَنْ يُؤْكَلَ لَحْ٠ُهَا وَ لَبَنُهَا فَكَتَبَ ( عليه السلا٠َكْرُوهٌ وَ لَا بَأْسَ بِهِ.

Is it permissible to use its milk and flesh for food?’ He (the Imam) wrote back saying, ‘It is an undesirable act but it is not unlawful.’ ” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (22/41))