1 Corinthians 9:3

3. Them that do examine me A judicial term, and may be rendered, my triers. It alludes to a class of Corinthian detractors who are brought into the foreground, and more fully answered in the second epistle.

This Followed by a period, and properly referring to the answer just given, not to what follows. His answer as to the validity of his apostleship is now complete. What follows is to assert that he is free.