Galatians 1:6-9

6I am amazed how quickly you are deserting the One who called you by the grace of Christ and are turning to a different gospel— 7which is not even a gospel. Evidently some people are troubling you and trying to distort the gospel of Christ.

8But even if we or an angel from heaven should preach a gospel contrary to the one we preached to you, let him be under a curse! 9As we have said before, so now I say again: If anyone is preaching to you a gospel contrary to the one you received, let him be under a curse!