2 Corinthians 8:19

8:19 In addition, this brother has also been chosen by the churches as our traveling companion as we administer this generous gift to the glory of the Lord himself and to show our readiness to help.

Philippians 2:25

2:25 But for now I have considered it necessary to send Epaphroditus to you. For he is my brother, coworker and fellow soldier, and your messenger and minister to me in my need.