Anas ibn Malik reported: The Messenger of Allah, peace and blessings be upon him, said, “There will be division and sectarianism in my nation, and a people will come with beautiful words and evil deeds. They will recite the Quran, but it will not pass beyond their throats. They will leave the religion as an arrow leaves its target, and they will not return to it as the arrow does not return to its bow. They are the worst of the creation. Blessed are those who fight them and are killed by them. They call to the Book of Allah, but they have nothing to do with it. Whoever fights them is better to Allah than them.”
Source: Sunan Abī Dāwūd 4765,
Grade: Sahih (authentic) according to Al-Albani
Ibn Kathir said, “If the Khawarij ever gained power, they would corrupt the entire land, Iraq and Syria. They would not leave alone a boy or a girl or a man or a woman, for in their view the people have become so corrupt that they cannot be reformed but by mass killing.”
Source: al-Bidāyah wal-Nihāyah 10/584
عَنْ َأَنَسِ بْنِ مَالِكٍ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ سَيَكُونُ فِي أُمَّتِي اخْتِلَافٌ وَفُرْقَةٌ قَوْمٌ يُحْسِنُونَ الْقِيلَ وَيُسِيئُونَ الْفِعْلَ يَقْرَءُونَ الْقُرْآنَ لَا يُجَاوِزُ تَرَاقِيَهُمْ يَمْرُقُونَ مِنْ الدِّينِ مُرُوقَ السَّهْمِ مِنْ الرَّمِيَّةِ لَا يَرْجِعُونَ حَتَّى يَرْتَدَّ عَلَى فُوقِهِ هُمْ شَرُّ الْخَلْقِ وَالْخَلِيقَةِ طُوبَى لِمَنْ قَتَلَهُمْ وَقَتَلُوهُ يَدْعُونَ إِلَى كِتَابِ اللَّهِ وَلَيْسُوا مِنْهُ فِي شَيْءٍ مَنْ قَاتَلَهُمْ كَانَ أَوْلَى بِاللَّهِ مِنْهُمْ
4765 سنن أبي داود كتاب السنة باب في قتال الخوارج
4765 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح أبي داود
قال ابن كثير إِذْ لَوْ قَوُوا هَؤُلَاءِ لَأَفْسَدُوا الْأَرْضَ كُلَّهَا عِرَاقًا وَشَامًا وَلَمْ يَتْرُكُوا طِفْلًا وَلَا طِفْلَةَ وَلَا رَجُلًا وَلَا امْرَأَةً لِأَنَّ النَّاسَ عِنْدَهُمْ قَدْ فَسَدُوا فَسَادًا لَا يُصْلِحُهُمْ إِلَّا الْقَتْلُ جُمْلَةً
10/584 البداية والنهاية