6. Ali ibn Ibrahim has narrated from al-Mukhtar ibn Muhammad ibn al-Mukhtar and Muhammad ibn al-Hassan from ‘Abd Allah ibn al- Hassan al-‘Alawiy all from al-Fath ibn Yazid al-Jurjaniy who has said the following
“I once wrote to abu al-Hassan (a.s.), asking about the skins of dead animals which are of the edible kind if slaughtered properly. He (the Imam) wrote in answer, ‘It is not permissible to benefit from the skins of dead animals or sinew (but you can benefit) from items from lambs, like wool even if they are pulled out, hairs, fur and rennet and nothing besides these by the will of Allah.’”