(36) باب مَنْ رَايَا بِقِرَاءَةِ الْقُرْآنِ أَوْ تَأَكَّلَ بِهِ أَوْ فَخَرَ بِهِ
Narrated `Ali:
I heard the Prophet (ﷺ) 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."
Reference: Sahih al-Bukhari 5057
In-book reference: Book 66, Hadith 82
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 6, Book 61, Hadith 577