Wearing al-Khazz (fur or skin of an animal that lives in water)
Al-Kāfi|Volume 6|Book 7|Chapter 9
عَنْهُ عَنْ جَعْفَرِ بْنِ عِيسَى قَالَ كَتَبْتُ إِلَى أَبِي الْحَسَنِ الرِّضَا ( عليه السلام ) أَسْأَلُهُ عَنِ الدَّوَابِّ الَّتِي يُعْمَلُ الْخَزُّ مِنْ وَبَرِهَا أَ سِبَاعٌ هِيَ فَكَتَبَ ( عليه السلام ) لَبِسَ الْخَزَّ الْحُسَيْنُ بْنُ عَلِيٍّ وَ مِنْ بَعْدِهِ جَدِّي ( عليهما السلام ) .
8. It is narrated from the narrator of the previous Hadith from Ja‘far ibn ‘Isa who has said the following: “I once wrote to Abu al-Hassan al-Rida عليه السلام about animals from the fur of which al-Khazz is made; if such animals are of predators.’ He (the Imam عليه السلام) wrote in answer, ‘Al-Husayn bin Ali عليه السلام wore al-Khazz (garments made from skin or fur of an animal that lives in water), and after him my grandfather also did so.’”
- Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (2/331)
- Ṣaḥīḥ al-Kāfī