2 Corinthians 8:20-24

taking precaution so that no one will discredit us in our administration of this generous gift; for we have regard for what is honorable, not only in the sight of the Lord, but also in the sight of men. We have sent with them our brother, whom we have often tested and found diligent in many things, but now even more diligent because of his great confidence in you. As for Titus, he is my partner and fellow worker among you; as for our brethren, they are messengers of the churches, a glory to Christ. Therefore openly before the churches, show them the proof of your love and of our reason for boasting about you.