Galatians 5:2, 6, 11
Galatians 5:2 NKJV
Indeed I, Paul, say to you that if you become circumcised, Christ will profit you nothing.
Galatians 5:6 NKJV
For in Christ Jesus neither circumcision nor uncircumcision avails anything, but faith working through love.
Galatians 5:11 NKJV
And I, brethren, if I still preach circumcision, why do I still suffer persecution? Then the offense of the cross has ceased.