Galatians 6:13

For not even they who receive circumcision do themselves keep the law; but they desire to have you circumcised, that they may glory in your flesh. [In taking the pen in his own hand it was natural that he should show his earnestness in what he had dictated about circumcision and the Judaizers, tracing with his own fingers a line or two more on that subject. This, therefore, he does, telling them that all those who desire to make a fair show in the flesh, i. e., to please men by complying with worldly demand, seek to compel them (the Galatians) to be circumcised. They did this for no zeal for circumcision, but in order to escape the persecution of their Jewish brethren for adherence to the doctrine of the cross. Moreover, these Judaizers who were thus urging circumcision did not do so from any zeal for the law, for they made no effort themselves to keep it, but they did it that they might boast to other strict and unconverted Jews how they were making Jews out of Gentile Christians. Thus their motives were not religious and holy, but base and selfish.]