Sahih Muslim 99
Sahih Muslim · Book 1: The Book of Faith · The Saying of the prophet (saws): "Whoever bears weapons against us is not one of us."
Iyas b. Salama narrated from his father that the Apostle (ﷺ) observed:
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ، وَابْنُ، نُمَيْرٍ قَالاَ حَدَّثَنَا مُصْعَبٌ، - وَهُوَ ابْنُ الْمِقْدَامِ - حَدَّثَنَا عِكْرِمَةُ بْنُ عَمَّارٍ ، عَنْ إِيَاسِ بْنِ سَلَمَةَ ، عَنْ أَبِيهِ ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ سَلَّ عَلَيْنَا السَّيْفَ فَلَيْسَ مِنَّا " .
He who draws the sword against us is not of us.