Mukhtasar Bukhari

Narrated by Sayyiduna Abu Huraira (may Allah be pleased with him) from the Noble Prophet (peace and blessings of Allah be upon him) that he (peace be upon him) said: "(Soon) knowledge will be taken away, ignorance and tribulations will prevail, and 'harj' will increase greatly." It was asked, "O Messenger of Allah! What is 'harj'?" So he (peace be upon him) gestured with his hand sideways and said: "Like this!" It seemed that by 'harj' he (peace be upon him) meant killing.