False Prophet

574.136 - 598.514 R.C. Sproul

And that's what Paul is saying, let that happen to the person who comes and teaches you another gospel. Let me just say that the severest punishment that we ever find in the Bible is that punishment directed not to the murderer or to the adulterer. That is not to suggest that those who are tolerated are allowed or anything, but the severest punishment is reserved for the false prophet.