عَنْ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ”إِذَا جَمَعَ اللَّهُ الْأَوَّلِينَ وَالْآخِرِينَ يَوْمَ الْقِيَامَةِ، رُفِعَ لِكُلِّ غَادِرٍ لِوَاءٌ، فَقِيلَ: هَذِهِ غَدْرَةُ فُلَانِ بْنِ فُلَانٍ“
It is narrated from Sayyiduna Abdullah bin Umar, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: On the Day of Resurrection, when Allah Almighty will gather the first and the last, a flag will be raised for every deceiver as a sign, and it will be said that this is the sign of the deceit of so-and-so, son of so-and-so.