‏ Acts 20:2-3

When he had gone over those parts. Visited Philippi, Thessalonica, Berea at least, and possibly other Macedonian churches.

He came into Greece. To Corinth. During the three months that he remained in Corinth, he wrote the greatest of all his letters, the Epistle to the Romans.
The Jews laid wait for him. "A plot was laid against him by the Jews" (Revised Version). We have no further details, but it was, no doubt, a murderous plot. To prevent it, his plans were changed, and instead of sailing to Syria, he again took the route to Macedonia.
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