Cross reference
Galatians 2:3
3 But not even Titus who was with me, being a Greek, was compelled to be circumcised:
Acts 16:3
3 Him would Paul have to go forth with him; and he took and circumcised him because of the Jews that were in those parts: for they all knew that his father was a Greek.
Galatians 5:2-6
2 Behold, I Paul say unto you, that, if ye receive circumcision, Christ will profit you nothing.
3 Yea, I testify again to every man that receiveth circumcision, that he is a debtor to do the whole law.
4 Ye are severed from Christ, ye would be justified by the law; ye are fallen away from grace.
5 For we through the Spirit by faith wait for the hope of righteousness.
6 For in Christ Jesus neither circumcision availeth anything, nor uncircumcision; but faith working through love.
1 Corinthians 9:20-21
20 And to the Jews I became as a Jew, that I might gain Jews; to them that are under the law, as under the law, not being myself under the law, that I might gain them that are under the law;
21 to them that are without law, as without law, not being without law to God, but under law to Christ, that I might gain them that are without law.
Acts 15:24
24 Forasmuch as we have heard that certain who went out from us have troubled you with words, subverting your souls; to whom we gave no commandment;
2 Corinthians 2:13
13 I had no relief for my spirit, because I found not Titus my brother: but taking my leave of them, I went forth into Macedonia.