Ibn Umar reported: The Messenger of Allah, peace and blessings be upon him, said, “When Allah gathers the earlier and later generations on the Day of Resurrection, He will raise a banner for every treacherous person. It will be announced that this is the treachery of this person, the son of this person.”
Source: Ṣaḥīḥ al-Bukhārī 6178, Ṣaḥīḥ Muslim 1735
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنِ ابْنِ عُمَرَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا جَمَعَ اللَّهُ الأَوَّلِينَ وَالآخِرِينَ يَوْمَ الْقِيَامَةِ يُرْفَعُ لِكُلِّ غَادِرٍ لِوَاءٌ فَقِيلَ هَذِهِ غَدْرَةُ فُلاَنِ بْنِ فُلاَنٍ
6178 صحيح البخاري كتاب الأدب باب ما يدعى الناس بآبائهم
1735 صحيح مسلم كتاب الجهاد والسير باب تحريم الغدر