John Gill Commentary 1 Thessalonians 1:7

"so that ye became an ensample to all that believe in Macedonia and in Achaia." — 1 Thessalonians 1:7 (ASV)

So that you were ensamples to all that believe
They were not only followers of Christ and his apostles, whom they took for examples of faith, holiness, courage, meekness, and patience; but they were patterns of good works; and of suffering afflictions to other believers, even to all that knew them, or heard of them, particularly

in Macedonia ;
as at Philippi and other places: though the Gospel was first preached there, and they had received it, and a Gospel church state was formed there; yet these were more forward in the exercise of grace and discharge of duty, and were even ensamples to them to copy after; so the first are sometimes last, and the last first:

and Achaia ;
another part of Greece, the metropolis of which was Corinth, where there also was a very considerable church; but these saints at Thessalonica set them an example in many things, and particularly in acts of beneficence and liberality, being one of the churches of Macedonia spoken of in (2 Corinthians 8:1) .