Acts 17:15

Unto Athens] D adds: 'But he passed by (i.e. did not preach in) Thessaly, for he was prevented from preaching the word to them.' It appears from 1 Thessalonians 3:1 that Timothy and Silas did actually join St. Paul at Athens according to his instructions, but the Apostle being filled with anxiety about the state of the Macedonian Churches which he had just founded, sent them back again to confirm them, and to bring him accurate tidings concerning them. Timothy was sent to Thessalonica, Silas (apparently) to Philippi, so that St. Paul was left alone in Athens. On returning from their mission, Timothy and Silas found that St. Paul had gone on to Corinth, and there they rejoined him (Acts 18:5).