NET
15 Nor do we boast beyond certain limits in the work done by others, but we hope that as your faith continues to grow, our work may be greatly expanded among you according to our limits,
Darby
15 not boasting out of measure in other people's labours, but having hope, your faith increasing, to be enlarged amongst you, according to our rule, yet more abundantly
KJV
15 Not boasting of things without [our] measure, [that is], of other men's labours; but having hope, when your faith is increased, that we shall be enlarged by you according to our rule abundantly,