John Gill Commentary Acts 17:13

"But when the Jews of Thessalonica had knowledge that the word of God was proclaimed of Paul at Beroea also, they came thither likewise, stirring up and troubling the multitudes." — Acts 17:13 (ASV)

But when the Jews of Thessalonica
The unbelieving Jews there,

had knowledge that the word of God was preached of Paul at
Berea ;
which they came at, either by persons that came from thence to Thessalonica, or by letters sent them:

they came thither also ;
as the Jews from Antioch and Iconium came to Lystra on a like account, (Acts 14:19)

and stirred up the people ;
the common people, the natives of the place, against the apostles; suggesting that they were wicked men, and enemies to all laws, human or divine, civil or religious.