It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: The animal killed by a grazing animal or an animal left in the name of idols is wasted; the blood of one who dies in a well is wasted; the blood of one who dies in a mine is wasted; and one-fifth of the treasure found in the earth belongs to the public treasury (Bayt al-Mal).