Galatians 5:2

2 Behold I, Paul, say to you that if you receive circumcision, Christ will be of no benefit to you.

Galatians 5:3

3 And I testify again to every man who receives circumcision, that he is under obligation to keep the whole Law.

11 But I, brothers, if I still preach circumcision, why am I still persecuted? Then the stumbling block of the cross would have been abolished.