Mishkat al-Masabih 18 The Offices of Commander and Qadi كتاب الإمارة والقضاء 64

وَعَنِ ابْنِ عُمَرَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: ” إِنَّ الْغَادِرَ يُنْصَبُ لَهُ لِوَاءٌ يَوْمَ الْقِيَامَةِ فَيُقَالُ: هَذِهِ غَدْرَةُ فُلَانِ بْنِ فُلَانٍ ”

Ibn ‘Umar reported God’s Messenger as saying, “The perfidious one will have a standard set up for him on the day of resurrection, and announcement will be made that this is the perfidy* of so and so, the son of so and so.” (Bukhari and Muslim.) * This is explained as meaning the sign, result, or punishment of his perfidy.