Luke
Acts 18:18ESV·traditional attribution

After this, Paul stayed many days longer and then took leave of the brothers and set sail for Syria, and with him Priscilla and Aquila. At Cenchreae he had cut his hair, for he was under a vow.

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...