Sahih Muslim , Book 41, Hadith 6903 (USC-MSA) ⓘ
Abu Huraira reported Allah's Messenger as saying: The last Hour will not come unless there is much bloodshed. They said: What is harj? Thereupon he said: Bloodshed. bloodshed.
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا يَعْقُوبُ، - يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ - عَنْ سُهَيْلٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ تَقُومُ السَّاعَةُ حَتَّى يَكْثُرَ الْهَرْجُ " . قَالُوا وَمَا الْهَرْجُ يَا رَسُولَ اللَّهِ قَالَ " الْقَتْلُ الْقَتْلُ " .
also referenced under: Book 54, Hadith 23 (In-Book) & Hadith 157 (Reference)