There salute thee Epaphras - The same persons who are here mentioned as greeting Philemon, are mentioned in the close of the Epistle to the Colossians - furnishing a high degree of evidence that Philemon resided at Colosse. Epaphras was a member of the church there; the notes at Colossians 4:12.
My fellow-prisoner in Christ Jesus - In the cause of Christ; Notes, Philemon 1:1. The circumstance of his being a prisoner is not mentioned in the parallel place in the Epistle to the Colossians, but nothing is more probable.