Galatians 5:4

"Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled; fail...; or, fall from"

"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."

"I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain."

"Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin."

"Remember therefore from whence thou art fallen, and repent, and do the first works; or else I will come unto thee quickly, and will remove thy candlestick out of his place, except thou repent."

"Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing."