Sahih Muslim 2921
Sahih Muslim · Book 54: The Book of Tribulations and Portents of the Last Hour · The Hour Will Not Begin Until A Man Passes By Another Man's Grave And Wishes That He Was In The Place Of The Deceased, Because Of Calamity
Abdullah b. 'Umar reported that Allah's Messenger (ﷺ) said:
حَدَّثَنَا حَرْمَلَةُ بْنُ يَحْيَى ، أَخْبَرَنَا ابْنُ وَهْبٍ ، أَخْبَرَنِي يُونُسُ ، عَنِ ابْنِ شِهَابٍ ، حَدَّثَنِي سَالِمُ بْنُ عَبْدِ اللَّهِ ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ ، أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " تُقَاتِلُكُمُ الْيَهُودُ فَتُسَلَّطُونَ عَلَيْهِمْ حَتَّى يَقُولَ الْحَجَرُ يَا مُسْلِمُ هَذَا يَهُودِيٌّ وَرَائِي فَاقْتُلْهُ " .
The Jews will fight against you and you will gain victory over them until the stone would say: Muslim, here is a Jew behind me; kill him.