“The Hour will not be established till two groups fight against each other, their claim being one and the same.”

Sahih al-Bukhari · Book 88 · Hadith 6935

حَدَّثَنَا عَلِيٌّ، حَدَّثَنَا سُفْيَانُ، حَدَّثَنَا أَبُو الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ لاَ تَقُومُ السَّاعَةُ حَتَّى تَقْتَتِلَ فِئَتَانِ دَعْوَاهُمَا وَاحِدَةٌ ‏"‏‏.‏

Narrated Abu Huraira: Allah's Messenger (ﷺ) said, "The Hour will not be established till two (huge) groups fight against each other, their claim being one and the same."