Luke
Acts 18:18BSB·traditional attribution

Paul remained in Corinth for quite some time before saying goodbye to the brothers. He had his head shaved in Cenchrea to keep a vow he had made, and then he sailed for Syria, accompanied by Priscilla and Aquila.

John Calvin Reformed @genevareformer

18. And when he had tarried there many days. Paul’s constancy appeareth in this, in that he is not driven away with fear, lest he should trouble the disciples, who were as yet ignorant and weak, with his sudden and untimely departure. We read in many other places, that when persecution was raised against him elsewhere he fled forthwith. What is the cause then, that he stayeth at Corinthus?

Matthew Henry Presbyterian @wholebiblehenry

We have here Paul in motion, as we have had him at Corinth for some time at rest, but in both busy, very busy, in the service of Christ; if he sat still, if he went about, still it was to do good. Here is, I. Paul's departure from Corinth, Act 18:18. 1.

Commenting on Acts 18:18-23

John Gill Reformed Baptist @doctorgill

When they desired him to tarry longer time with them,.... Either Aquila and Priscilla, whom he left here, for here they were, as is certain from Ac 18:24,26 or rather the Jews with whom he reasoned, who might be desirous of further conference with him, upon the subject they had disputed about; either in order to gain more knowledge, or in hopes of baffling and...