Treasury of Scripture Knowledge
Behold, I, Paul, say unto you that if ye become circumcised, Christ shall profit you nothing.
forasmuch as we have heard that certain ones who went out from us have troubled you with words, subverting your souls, saying, Ye must be circumcised and keep the law, to whom we gave no such commandment,
Paul desired to have him go forth with him and took and circumcised him because of the Jews who were in those quarters, for they all knew that his father was a Greek.
1 Corinthians 9:20
And unto the Jews I became as a Jew, that I might gain the Jews; to those that are under the law, as under the law, that I might gain those that are under the law;