Galatians 2:2

2:2 I went there because of a revelation and presented to them the gospel that I preach among the Gentiles. But I did so only in a private meeting with the influential people, to make sure that I was not running – or had not run – in vain.

Galatians 3:10

3:10 For all who rely on doing the works of the law are under a curse, because it is written, “Cursed is everyone who does not keep on doing everything written in the book of the law.”