"A group will secede at a time of division among the people, and they will be killed by the group that is closer to the truth." (Using translation from Muslim 1065d)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «تَمْرُقُ مَارِقَةٌ مِنَ النَّاسِ سَيَلِي قَتْلَهُمْ أَوْلَى الطَّائِفَتَيْنِ بِالْحَقِّ»  

There would be two groups in my Ummah, and there would emerge another group (seceding itself from both of them), and the party nearer to the truth among the two would kill them (the group of the Khawarij). (Using translation from Muslim 1065c)   

قَالَ رَسُولُ اللهِ ﷺ «سَتَكُونُ أُمَّتِي فِرْقَتَيْنِ فَتَخْرُجُ مِنْ بَيْنَهُمَا مَارِقَةٌ يَلِي قَتْلَهَا أَوْلَاهُمَا بِالْحَقِّ»  

[Machine] The Messenger of Allah ﷺ said, "My nation will divide into two groups, and there will be a group that deviates between them, killing them is more deserving of the two groups with the truth."  

قَالَ رَسُولُ اللهِ ﷺ «تَفْتَرِقُ أُمَّتِي فِرْقَتَيْنِ يَمْرُقُ بَيْنَهُمَا مَارِقَةٌ تَقْتُلُهُمْ أَوْلَى الطَّائِفَتَيْنِ بِالْحَقِّ»  

In the event of the dissension among Muslims an emerging sect will emerge ; one of the two parties that is nearer to the truth will kill it. (Using translation from Abū Dāʾūd 4667)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «تَمْرُقُ مَارِقَةٌ عِنْدَ فِرْقَةٍ مِنَ النَّاسِ تَقْتُلُهَا أَوْلَى الطَّائِفَتَيْنِ بِالْحَقِّ»  

[Machine] He mentioned to his nation a group of people who will emerge among the people, their characteristic being that they have shaved heads. They will abandon religion as an arrow passes swiftly through its target. They are the worst of creation or the worst amongst creation. You will kill them, O people of Iraq.  

أَنَّهُ ذَكَرَ نَاسًا فِي أُمَّتِهِ يَخْرُجُونَ فِي فِرْقَةٍ مِنَ النَّاسِ سِيمَاهُمُ التَّحْلِيقُ يَمْرُقُونَ مِنَ الدِّينِ كَمَا يَمْرُقُ السَّهْمُ مِنَ الرَّمِيَّةِ هُمْ مِنْ شَرِّ الْخَلْقِ أَوْ هُمْ شَرُّ الْخَلْقِ تَقْتُلُهُمْ أَدْنَى الطَّائِفَتَيْنِ إِلَى الْحَقِّ قَالَ وَقَالَ كَلِمَةً أُخْرَى قُلْتُ بَيْنِي وَبَيْنَهُ مَا هِيَ؟ قَالَ «وَأَنْتُمْ قَتَلْتُمُوهُمْ يَا أَهْلَ الْعِرَاقِ»  

[Machine] About the Messenger of Allah, ﷺ , concerning a group of people who would depart from this Ummah (community). He mentioned their prayers, their charity, and their fasting, but they would quickly abandon Islam like an arrow leaves the bowstring. The Quran would not go beyond their throats (they wouldn't understand or practice it properly). They would emerge in a faction of people whom the closest people to the truth would fight against.  

عَنْ رَسُولِ اللهِ ﷺ فِي «قَوْمٍ يَخْرُجُونَ مِنْ هَذِهِ الْأُمَّةِ فَذَكَرَ مِنْ صَلَاتِهِمْ وَزَكَاتِهِمْ وَصَوْمِهِمْ يَمْرُقُونَ مِنَ الْإِسْلَامِ كَمَا يَمْرُقُ السَّهْمُ مِنَ الرَّمِيَّةِ لَا يُجَاوِزُ الْقُرْآنُ تَرَاقِيَهُمْ يَخْرُجُونَ فِي فِرْقَةٍ مِنَ النَّاسِ يُقَاتِلُهُمْ أَقْرَبُ النَّاسِ إِلَى الْحَقِّ»