Galatians 1:6-9 Revised Standard Version Catholic Edition (RSVCE)
There Is No Other Gospel
6 I am astonished that you are so quickly deserting him who called you in the grace of Christ and turning to a different gospel—[a] 7 not that there is another gospel, but there are some who trouble you and want to pervert the gospel of Christ. 8 But even if we, or an angel from heaven, should preach to you a gospel contrary to that which we preached to you, let him be accursed. 9 As we have said before, so now I say again, If any one is preaching to you a gospel contrary to that which you received, let him be accursed.