al-Qasim ibn Muhammad القاسم بن محمد بن أبي بكر الصديق · The Book on Clothing

"The Messenger of Allah (ﷺ) prohibited wearing Al-Qassi and what was dyed with 'Usfur." There are narrations on this topic from Anas and 'Abdullah bin 'Amr.

"The Messenger of Allah (ﷺ) was asked about fat, cheese, and furs, so he said: 'The lawful is what Allah made lawful in His Book, the unlawful is what Allah made unlawful in his Book, and what He was silent about; then it is among that for which He has pardoned.'" There is something on this topic from Al-Mughirah, and this Hadith is Gharib, we do not know of it being Marfu' except from this route. Sufyan and others reported…