(18) بَاب لَا تَقُومُ السَّاعَةُ حَتَّى يَمُرَّ الرَّجُلُ بِقَبْرِ الرَّجُلِ فَيَتَمَنَّى أَنْ يَكُونَ مَكَانَ الْمَيِّتِ مِنْ الْبَلَاءِ
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
By Him in Whose Hand is my life, a time would come when the murderer would not know why he has committed the murder, and the victim would not know why he has been killed.
Reference: Sahih Muslim 2908 a
In-book reference: Book 54, Hadith 69
USC-MSA web (English) reference(deprecated numbering scheme): Book 41, Hadith 6949