وَكُلُّ شَيْءٍ لَا يَسْرِي فِيهِ الدَّمُ لَا يَنْجُسُ بِالْمَوْتِ كَالشَّعْرِ وَالرِّيشِ الْمَجْزُوزِ وَالْقَرْنِ وَالْحَافِرِ وَالْعَظْمِ مَا لَمْ يَكُنْ بِهِ دَسَمٌ، وَالْعَصَبُ نَجِسٌ فِي الصَّحِيحِ
Clipped hair/feathers, horn, hoof and bone without carcass grease are not made impure merely by death. The root of a plucked feather is treated differently, and nerve/tendon is impure in the sound position stated here.
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Purification of Hides and Special Animal Substances
وَكُلُّ شَيْءٍ لَا يَسْرِي فِيهِ الدَّمُ لَا يَنْجُسُ بِالْمَوْتِ كَالشَّعْرِ وَالرِّيشِ الْمَجْزُوزِ وَالْقَرْنِ وَالْحَافِرِ وَالْعَظْمِ مَا لَمْ يَكُنْ بِهِ دَسَمٌ، وَالْعَصَبُ نَجِسٌ فِي الصَّحِيحِ
Clipped hair/feathers, horn, hoof and bone without carcass grease are not made impure merely by death. The root of a plucked feather is treated differently, and nerve/tendon is impure in the sound position stated here.