It is narrated from Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) that he said concerning furs (al-fira'): Its purification is by tanning.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 86
Hadith Gradingمحدثین:ضعيف
Hadith Takhrij«ضعيف۔ فيه محمد بن عبد الرحمن بن ابي ليليٰ»