(14) باب حُكْمِ مَنْ فَرَّقَ أَمْرَ الْمُسْلِمِينَ وَهُوَ مُجْتَمِعٌ
It has been narrated (through a still different chain of transmitters) on the Same authority (i. e. 'Arfaja) who said similarly-but adding:
" Kill all of them." I heard the Messenger of Allah (ﷺ) say: When you are holding to one single man as your leader, you should kill who seeks to undermine your solidarity or disrupt your unity.
Reference: Sahih Muslim 1852 c
In-book reference: Book 33, Hadith 95
USC-MSA web (English) reference(deprecated numbering scheme): Book 20, Hadith 4567