It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The Hour will not be established until wealth becomes so abundant and widespread that a man will take out the zakat of his wealth but will not find anyone to accept it, and until the land of Arabia becomes filled with rivers and streams, and until "harj" becomes widespread. The companions (may Allah be pleased with them) asked, "O Messenger of Allah! What is meant by harj?" He replied, "Killing."