Abu Sa'id al-Khudri reported from the Messenger of Allah ﷺ that a group (Khawarij) would emerge from the different parties (the party of Hadrat 'Ali and the party of Amir Mu'awiya), the group nearer the truth between the two would kill them.
عَنِ النَّبِيِّ ﷺ فِي حَدِيثٍ ذَكَرَ فِيهِ قَوْمًا يَخْرُجُونَ عَلَى فُرْقَةٍ مُخْتَلِفَةٍ يَقْتُلُهُمْ أَقْرَبُ الطَّائِفَتَيْنِ مِنَ الْحَقِّ
[Machine] "Narrated by the Prophet ﷺ in a hadith mentioned by a group of people, who will emerge as a distinct faction among the people, and they will be killed by the closest of the two parties to the truth."
عَنِ النَّبِيِّ ﷺ فِي حَدِيثٍ ذَكَرَهُ قَوْمٌ يَخْرُجُونَ عَلَى فُرْقَةٍ مِنَ النَّاسِ مُخْتَلِفَةٍ يَقْتُلُهُمْ أَقْرَبُ الطَّائِفَتَيْنِ إِلَى الْحَقِّ
[Machine] About the Messenger of Allah ﷺ in a hadith in which he mentioned a group of people who go out against a party of people and those closest to the truth kill them.
عَنْ رَسُولِ اللهِ ﷺ فِي حَدِيثٍ ذَكَرَ فِيهِ قَوْمًا يَخْرُجُونَ عَلَى فُرْقَةٍ مِنَ النَّاسِ يَقْتُلُهُمْ أَقْرَبُ الْفِئَتَيْنِ إِلَى الْحَقِّ