Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) narrates that I heard the Messenger of Allah (peace and blessings be upon him) in the year of conquest, and he was in Makkah, saying: "Indeed, Allah and His Messenger (peace and blessings be upon him) have forbidden the trade of intoxicants, carrion, and the flesh of swine." It was asked, "O Messenger of Allah (peace and blessings be upon him)! What is your opinion about the fat of carrion? For indeed, it is used to oil water skins, it is used to oil leather, and people use it to light lamps." He (peace and blessings be upon him) said: "No, it is forbidden." May Allah destroy the Jews, for when Allah made fat forbidden for them, they melted it, then sold it and consumed its price."