NET
14 But if anyone does not obey our message through this letter, take note of him and do not associate closely with him, so that he may be ashamed.
Darby
14 But if any one obey not our word by the letter, mark that man, and do not keep company with him, that he may be ashamed of himself;
KJV
14 And if any man obey not our word by this epistle, note that man, and have no company with him, that he may be ashamed.