Colossians 2:1

2:1 For I want you to know how great a struggle I have for you, and for those in Laodicea, and for those who have not met me face to face.

Colossians 4:8

4:8 I sent him to you for this very purpose, that you may know how we are doing and that he may encourage your hearts.

Colossians 4:10

4:10 Aristarchus, my fellow prisoner, sends you greetings, as does Mark, the cousin of Barnabas (about whom you received instructions; if he comes to you, welcome him).