Sahih al-Bukhari 7072
Sahih al-Bukhari · Book 92: Afflictions and the End of the World · “Whosoever takes up arms against us, is not from us.”
Narrated Abu Huraira:
حَدَّثَنَا مُحَمَّدٌ ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ ، عَنْ مَعْمَرٍ ، عَنْ هَمَّامٍ ، سَمِعْتُ أَبَا هُرَيْرَةَ ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لاَ يُشِيرُ أَحَدُكُمْ عَلَى أَخِيهِ بِالسِّلاَحِ، فَإِنَّهُ لاَ يَدْرِي لَعَلَّ الشَّيْطَانَ يَنْزِعُ فِي يَدِهِ، فَيَقَعُ فِي حُفْرَةٍ مِنَ النَّارِ " .
The Prophet (ﷺ) said, "None of you should point out towards his Muslim brother with a weapon, for he does not know, Satan may tempt him to hit him and thus he would fall into a pit of fire (Hell)"