Acts 16:3

It is indeed amazing, the wisdom of Paul! He that has had so many battles about circumcision, he that moved all things to this end, and did not give over until he had carried his point, now that the decree is made sure, circumcises the disciple. He not only does not forbid others, but himself does this thing. "Him," it says, "he would have to go forth with him." And the wonder is this, that he even took him unto him. "Because of the Jews," it says, "which were in those parts": for they would not endure to hear the word from one uncircumcised. Nothing could be wiser. So that in all things he looked to what was profitable: he did nothing upon his own preference.

And what (then)? Mark the success: he circumcised, that he might take away circumcision: for he preached the decrees of the Apostles. He was about to make him a bishop, and it was not meet that he should be uncircumcised. Since therefore he was about to preach, that he might not smite the Jews a double blow, he circumcised Timothy. And yet he was but half (a Jew by birth), his father being a Greek: but yet, because that was a great point carried in the cause of the Gentiles, he did not care for this: for the Word must needs be disseminated: therefore also he with his own hands circumcised him.