Virtues of the Qur'an
Bukhari :: Book 6 :: Volume 61 :: Hadith 577
I heard the Prophet saying, "In the last days (of the world) there will appear young people with foolish thoughts and ideas. They will give good talks, but they will go out of Islam as an arrow goes out of its game, their faith will not exceed their throats. So, wherever you find them, kill them, for there will be a reward for their killers on the Day of Resurrection."
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