Galatians 1:8-9

8 We have taught you the true message about God's good news. Nobody should ever teach a message that is different from that. 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 them. 9 We 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 them for ever.