Galatians 1:8

1:8 But even if we (or an angel from heaven) should preach a gospel contrary to the one we preached to you, let him be condemned to hell!

Galatians 3:11-12

3:11 Now it is clear no one is justified before God by the law, because the righteous one will live by faith. 3:12 But the law is not based on faith, but the one who does the works of the law will live by them.