Sahih Bukhari Volume 8, Book 73, Hadith Number 63.

Narated By Abu Huraira : Allah’s Apostle said, “Time will pass rapidly, good deeds will decrease, and miserliness will be thrown (in the hearts of the people), and the Harj (will increase).” They asked, “What is the Harj?” He replied, “(It is) killing (murdering), (it is) murdering (killing).