Galatians 1:8-9

8Nobody should ever teach a message that is different from the good news that we taught you. Neither we ourselves, nor even an angel from heaven, should ever teach a different message. If anyone does that, I pray that God would curse him.

9We have already said this, but now I will say it again. Do not accept any message that is different from the message that we taught you. If anyone teaches a different message, I pray that God will curse him very strongly.