It was narrated from Abu Hurairah in a Marfu’ report (meaning, attributed to the Prophet (ﷺ)):“Time will pass quickly, knowledge will decrease, miserliness will be cast into people’s hearts, tribulations will appear and there will be much Harj.” They said: “O Messenger of Allah, what is Harj?” He said: “Killing.”

English translation · Sunan Ibn Majah