It is narrated from Sayyiduna Abdullah bin Umar, may Allah be pleased with him, who says: I heard the Messenger of Allah, peace and blessings be upon him, say: In my Ummah, there will arise a people of evil deeds, who will recite the Qur'an, but it will not go beyond their throats. (Apparently, their deeds will be so good that) you will consider your own deeds insignificant compared to theirs. They will kill the people of Islam. When such people appear, you must kill them. After that, if they appear again, kill them. Then, if they appear again, kill them. There is glad tidings for the one who kills them, and glad tidings for the one who is killed by them. When their generation appears, Allah Almighty will destroy it. The Messenger of Allah, peace and blessings be upon him, repeated this statement twenty or even more times, and I kept listening.