2 Corinthians 8:22-24

22And we are sending along with them our brother who has proven his earnestness to us many times and in many ways, and now even more so by his great confidence in you. 23As for Titus, he is my partner and fellow worker among you. As for our brothers, they are messengers1 of the churches, the glory of Christ. 24In full view of the churches, then, show these men the proof of your love and the reason for our boasting about you.