Sahih Muslim 2894 a
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
The Last Hour would not come before the Euphrates uncovers a mountain of gold, for which people would fight. Ninety-nine out of each one hundred would die but every man amongst them would say that perhaps he would be the one who would be saved (and thus possess this gold).
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا يَعْقُوبُ، - يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ الْقَارِيَّ - عَنْ 
 سُهَيْلٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏
"‏ لاَ تَقُومُ السَّاعَةُ
 حَتَّى يَحْسِرَ الْفُرَاتُ عَنْ جَبَلٍ مِنْ ذَهَبٍ يَقْتَتِلُ النَّاسُ عَلَيْهِ فَيُقْتَلُ مِنْ كُلِّ مِائَةٍ تِسْعَةٌ وَتِسْعُونَ
 وَيَقُولُ كُلُّ رَجُلٍ مِنْهُمْ لَعَلِّي أَكُونُ أَنَا الَّذِي أَنْجُو ‏"‏ ‏.‏