It is reported about Muslim bin Abi Bakrah that a man asked him: "Have you heard anything about the Khawarij?" He said: I heard my father, Sayyiduna Abu Bakrah (may Allah be pleased with him), state this from the Prophet (peace and blessings be upon him): (The Prophet (peace and blessings be upon him) said:) "Beware! Soon some people will emerge from my Ummah who will be harsh and sharp; their tongues will be eloquent (or sharp) with the Qur'an, but the Qur'an will not go beyond their throats. Beware! When you see them, strike them down; when you see them, strike them down, for the one who kills them will be rewarded."
Ahmad recorded it, and its narrators are the narrators of the Sahih.
Al-Tabarani also recorded it, and likewise al-Bazzar recorded a similar narration.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب قتال أهل البغي / 10420
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه البزار فى المسند (1859) اخرجه احمد فى المسند (44/5) ، أخرجه مسند أحمد برقم: 19933، وأخرجه مسند البزار برقم: 3676»