Jamieson, Fausset and Brown on Acts 17:10-12

10-12. the brethren immediately sent away Paul and Silas by night--for it would have been as useless as rash to attempt any further preaching at that time, and the conviction of this probably made his friends the more willing to pledge themselves against any present continuance of missionary effort.

unto Berea--fifty or sixty miles southwest of Thessalonica; a town even still of considerable population and importance.