Buying and Selling: Buying and Selling Products Acquired from a Muslim Who Acquired Them from a Disbeliever

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 2070

Oil and other products acquired from an animal after it has died are considered pure, and buying and selling them is permitted. The same applies to leather acquired from a Muslim whom a person knows to have acquired it from a disbeliever without investigating whether or not the leather was acquired from an animal that was slaughtered according to Islamic law. However, consuming such oil and the like is not permitted.

-Ayatullah Sistani, Practical Laws of Islam, Buying and Selling