Musnad Ahmad 5:776

Yahya ibn Adam narrated to us, Isra'il narrated to us, from Abu Ishaq, from Suwayd ibn Ghafalah, from Ali, may Allah be pleased with him, who said: The Messenger of Allah, may Allah bless him and grant him peace, said: "There will be in the end of time a people who recite the Quran, it does not pass beyond their collarbones. They will pass through Islam just as an arrow passes through the game. Fighting them is a duty upon every Muslim."