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 time will come near, wealth will flow like water, tribulations will appear, and 'Harj' will become abundant." Someone asked, "What is the meaning of 'Harj'?" He replied, "Killing."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10792