John Gill Commentary 1 Thessalonians 5:28

"The grace of our Lord Jesus Christ be with you." — 1 Thessalonians 5:28 (ASV)

The grace of our Lord Jesus Christ be with you, Amen .
] This is the apostle's usual salutation in all his epistles, and the token of the genuineness of them, (2 Thessalonians 3:17 2 Thessalonians 3:18) . (See Gill on Romans 16:20), (See Gill on 1 Corinthians 15:23), (See Gill on 2 Corinthians 13:14).

The subscription to this epistle is not genuine, which runs thus, "The first Epistle unto the Thessalonians was written from Athens"; whereas it appears from (1 Thessalonians 3:1 1 Thessalonians 3:6) compared with (Acts 18:1Acts 18:5) that it was written from Corinth, and not from Athens; nor are these last words, "from Athens", in Beza's Claromontane copy; though they stand in the Syriac and Arabic versions of the London Polygot Bible, which add, "and sent by Timothy", and in the Alexandrian copy, and Complutensian edition.