Sahih al-Bukhari, Book 90, Hadith 13 (In-Book) ⓘ
Narrated `Abdullah bin `Umar: The Prophet said, "For every betrayer there will be a flag by which he will be recognized on the Day of Resurrection. "
حَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا سُفْيَانُ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ عَنِ النَّبِيِّ صلى الله عليه وسلم " لِكُلِّ غَادِرٍ لِوَاءٌ يَوْمَ الْقِيَامَةِ يُعْرَفُ بِهِ " .
also referenced under: Hadith 6966 (DarusSalam) & Volume 9, Book 86, Hadith 96 (USC-MSA)