It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "Whoever raises a weapon against us is not one of us."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5149
Hadith Gradingحکم دارالسلام:إسناده صحيح ، خ : 7070 ، م : 98 .