Luke
Acts 18:13ESV·traditional attribution

saying, “This man is persuading people to worship God contrary to the law.”

Matthew Henry Presbyterian @wholebiblehenry

We have here an account of some disturbance given to Paul and his friends at Corinth, but no great harm done, nor much hindrance given to the work of Christ there. I. Paul is accused by the Jews before the Roman governor, Act 18:12, Act 18:13. The governor was Gallio, deputy of Achaia, that is, proconsul; for Achaia was a consular province of the empire.

Commenting on Acts 18:12-17

John Gill Reformed Baptist @doctorgill

Saying, this fellow persuadeth men to worship God contrary to the law. Meaning either to the law of the Romans, which forbad the bringing in of any new gods, without the leave of the senate; See Gill on Act 16:21; or rather to the law of Moses: the Arabic version reads, "our law"; though this was false, for Moses in his law wrote of Christ...

Albert Barnes Presbyterian @notesbybarnes

Verse 13. Contrary to the law. Evidently intending contrary to all law--the laws of the Romans and of the Jews. It was permitted to the Jews to worship God according to their own views in Greece; but they could easily pretend that Paul had departed from that mode of worshipping God.