Galatians 6:11-13

See with what large letters I am writing to you with my own hand. It is those who want to make a good showing in the flesh who would force you to be circumcised, and only in order that they may not be persecuted for the cross of Christ. For even those who are circumcised do not themselves keep the law, but they desire to have you circumcised that they may boast in your flesh.