Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Prophet Muhammad (peace and blessings be upon him) said: "Whoever abandons his religion (i.e., the religion of Islam) (the narrator is in doubt, perhaps these are the words) whoever turns back from his religion (i.e., the religion of Islam), then kill him, and do not inflict upon anyone the punishment which Allah, the Exalted, will inflict (the narrator says:) that is, do not punish with fire."