Paul's Letter to the Galatians - Chapter 6 verses 10 to 13

(10)  As we have therefore opportunity, let us do good unto all men, especially unto them who are of the household of faith.
(11)  Ye see how large a letter I have written unto you with mine own hand.
(12)  As many as desire to make a fair shew in the flesh, they constrain you to be circumcised; only lest they should suffer persecution for the cross of Christ.
(13)  For neither they themselves who are circumcised keep the law; but desire to have you circumcised, that they may glory in your flesh.