Is it permissible to sell impure substances like the fat of a carcass?
General Chapter
Al-Mughni
Book of Hunting and Slaughter
Primary text
There is no ambiguity regarding the prohibition of eating impure substances, based on the command 'Do not approach it' and because the impure is considered foul, and Allah has forbidden the foul (Khaba'ith). Regarding its sale, the apparent statement of Ahmad is that it is forbidden, based on the Prophet's (peace be upon him) statement: 'When Allah prohibits something, He prohibits its price.' Abu Musa stated regarding *sawiq* (ground grain): 'Sell it, but do not sell it to a Muslim, and make it known [that it is impure].'
Supporting text
Abu al-Khattab narrated a narration from Ahmad that it may be sold to a non-Muslim on the condition that its impurity is made known, because non-Muslims believe it to be lawful and permit eating it. However, the foundational evidence prohibits this based on the Hadith: 'Allah cursed the Jews; fats were forbidden to them, so they rendered them down, sold them, and ate their price. Indeed, when Allah forbids something, He forbids its price,' which is agreed upon. Their belief in its lawfulness does not permit us to sell it to them, similar to wine and pigs.