The Apostle Paul
2 Corinthians 10:16ESV·traditional attribution

so that we may preach the gospel in lands beyond you, without boasting of work already done in another’s area of influence.

Matthew Henry Presbyterian @wholebiblehenry

In these verses observe, I. The apostle refuses to justify himself, or to act by such rules as the false apostles did, Co2 10:12. He plainly intimates that they took a wrong method to commend themselves, in measuring themselves by themselves, and comparing themselves among themselves, which was not wise.

Commenting on 2 Corinthians 10:12-18

Albert Barnes Presbyterian @notesbybarnes

Verse 16. To preach the gospel in the regions beyond you. What regions are referred to here can be only a matter of conjecture. It may be that he wished to preach in other parts of Greece, and that he designed to go to Arcadia or Lacedaemon.

Jamieson-Fausset-Brown Reformed @jfbcommentary

To--that is, so as to preach . . . beyond you (and) not to boast, &c. in another man's line of things made ready to our hand--Do not connect "line of things," &c.; but "boast of things," &c. To make this clearer, arrange the words thus, "Not to boast as to things (already made by the preaching of others) ready to our hand in another...