It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The Hour will not be established until knowledge is taken away, ignorance prevails, and "harj" becomes widespread. Someone asked, "What is the meaning of harj?" He replied, "Killing."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 9527