Galatians 5:2, 6, 11

Look: I, Paul, say to you that if you accept circumcision, Christ will be of no advantage to you.

For in Christ Jesus neither circumcision nor uncircumcision counts for anything, but only faith working through love.

But if I, brothers, still preach circumcision, why am I still being persecuted? In that case the offense of the cross has been removed.