(16) Retaliation
كتاب القصاص
(4a) Chapter: Killing Apostates and People who Strive to cause Mischief - Section 1
(4) باب قتل أهل الردة والسعاة بالفساد - الفصل الأول
Mishkat al-Masabih 3536 
Abu Sa'id al-Khudri reported God’s Messenger as saying, “My people will be in two sections from among whom a seceding party will go out, and those who are nearest to the truth will undertake the killing of them.” Muslim transmitted it.
وَعَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «يَكُونُ أُمَّتِي فِرْقَتَيْنِ فَيَخْرُجُ مِنْ بَيْنِهِمَا مَارِقَةٌ يَلِي قَتْلَهُمْ أولاهم بِالْحَقِّ» . رَوَاهُ مُسلم
 صَحِيح  (الألباني)حكم :
Reference : Mishkat al-Masabih 3536
In-book reference : Book 16, Hadith 83