Romans 11:6

[6]And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace: otherwise work is no more work. Galatians 5:4

[4]Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace. Romans 4:4-5

[4]Now to him that worketh is the reward not reckoned of grace, but of debt.

[5]But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness. Ephesians 2:8-9

[8]For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:

[9]Not of works, lest any man should boast.