'Fellow prisoner' in the Bible

Aristarchus my fellowprisoner saluteth you, and Marcus, sister's son to Barnabas, (touching whom ye received commandments: if he come unto you, receive him;)

There salute thee Epaphras, my fellowprisoner in Christ Jesus;

Remember those who are in prison, as if you were their fellow prisoner, and those who are mistreated, since you also are in the body [and subject to physical suffering].