Galatians 5:2-6

Behold, I Paul say unto you, that, if ye receive circumcision, Christ will profit you nothing. Yea, I testify again to every man that receiveth circumcision, that he is a debtor to do the whole law. Ye are severed from Christ, ye who would be justified by the law; ye are fallen away from grace. For we through the Spirit by faith wait for the hope of righteousness. For in Christ Jesus neither circumcision availeth anything, nor uncircumcision; but faith working through love.