It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "In the last era, a people will emerge who will be foolish and young in age. They will speak the best words among mankind (the words of the Prophet, peace be upon him) and will recite the Noble Qur'an with their tongues, but it will not go beyond their throats. They will go out of Islam just as an arrow passes through its prey. Whoever finds them should kill them, for killing them brings a great reward from Allah for the killer."