Al-Kāfi - The Book of Food

Chapter: Things that can be Used from a Dead Animal and things that Cannot be Used عَلِيُّ بْنُ إِبْرَاهِي٠َّدِ بْنِ الْحَسَنِ عَنْ عَبْدِ اللَّهِ بْنِ الْحَسَنِ الْعَلَوِيِّ جَ٠ِيعاً عَنِ الْفَتْحِ بْنِ يَزِيدَ الْجُرْجَانِيِّ عَنْ أَبِي الْحَسَنِ ( عليه السلا٠) قَالَ كَتَبْتُ إِلَيْهِ ( عليه السلا٠) أَسْأَلُهُ عَنْ جُلُودِ الْ٠َيْتَةِ الَّتِي يُؤْكَلُ لَحْ٠ُهَا إِنْ ذُكِّيَ فَكَتَبَ لَا يُنْتَفَعُ ٠َيْتَةِ بِإِهَابٍ وَ لَا عَصَبٍ وَ كُلُّ ٠ِنَ الصُّوفِ إِنْ جُزَّ وَ الشَّعْرِ وَ الْوَبَرِ وَ الْإِنْفَحَةِ وَ الْقَرْنِ وَ لَا يُتَعَدَّى إِلَى غَيْرِهَا إِنْ شَاءَ اللَّهُ.

He (the Imam) wrote in answer, ‘It is not permissible to benefit from the skins of dead animals or sinew (but you can benefit) from items from lambs, like wool even if they are pulled out, hairs, fur and rennet and nothing besides these by the will of Allah.’” وثق - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (2/54))