John Calvin Commentary 1 Corinthians 16:3

"And when I arrive, whomsoever ye shall approve, them will I send with letters to carry your bounty unto Jerusalem:" — 1 Corinthians 16:3 (ASV)

And when I come — As we are cheerful in giving when we know for certain that what we give is properly used, he points out to the Corinthians a method by which they may be assured of a good and faithful administration — by selecting approved persons to whom they may entrust the matter. Moreover, he offers his own services, if desired, which is evidence that he has the matter at heart.