Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) narrates: The Hour will not be established until harj becomes abundant among you. He said this three times. The people asked: What is meant by harj? He replied: Killing and bloodshed.
Al-Tabarani recorded it in al-Mu'jam al-Awsat without attributing it to the Prophet (as a marfu' hadith); its chain contains the narrator Atiyyah, and he is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الفتن - أعاذنا الله منها / 12372