Galatians 2:21 in the King James Version
I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.
Context
20 I have been crucified with Christ, and it is no longer I who live, but Christ lives in me. That life which I now live in the flesh, I live by faith in the Son of God, who loved me and gave himself up for me.
21 I don’t reject the grace of God. For if righteousness is through the law, then Christ died for nothing!”