A.T. Robertson Commentary 2 Timothy 4:20

"Erastus remained at Corinth: but Trophimus I left at Miletus sick." — 2 Timothy 4:20 (ASV)

Erastus (Εραστος). See Ac 19:22; Romans 16:23.

Trophimus (Τροφιμον). A native of Ephesus and with Paul in Jerusalem (Acts 20:4; Acts 21:29).

At Miletus sick (εν Μιλητω ασθενουντα). Present active participle of ασθενεω, to be weak. Probably on Paul's return from Crete.