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.”

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ الأَعْلَى، عَنْ مَعْمَرٍ، عَنِ الزُّهْرِيِّ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، يَرْفَعُهُ قَالَ ‏"‏ يَتَقَارَبُ الزَّمَانُ وَيَنْقُصُ الْعِلْمُ وَيُلْقَى الشُّحُّ وَتَظْهَرُ الْفِتَنُ وَيَكْثُرُ الْهَرْجُ ‏"‏ ‏.‏ قَالُوا يَا رَسُولَ اللَّهِ وَمَا الْهَرْجُ قَالَ ‏"‏ الْقَتْلُ ‏"‏ ‏.‏