Romans 16:7

16:7 Greet Andronicus and Junia, my compatriots and my fellow prisoners. They are well known to the apostles, and they were in Christ before me.

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).