Abdullah bin Qays al-Basri (may Allah have mercy on him) heard Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) say that the flesh of a carcass and its blood are forbidden.
(b) For those who declared pure the hair that is on the skin of a carcass, holding that it becomes pure when the skin is tanned, this hadith is their evidence.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 84