Galatians 1:6-9 (New International Version)

No Other Gospel

 ⁶I am astonished that you are so quickly deserting the one who called you by the grace of Christ and are turning to a different gospel— ⁷which is really no gospel at all. Evidently some people are throwing you into confusion and are trying to pervert the gospel of Christ. ⁸But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let him be eternally condemned! ⁹As we have already said, so now I say again: If anybody is preaching to you a gospel other than what you accepted, let him be eternally condemned!