Luke
Acts 4:13BSB·traditional attribution

When they saw the boldness of Peter and John and realized that they were unschooled, ordinary men, they marveled and took note that these men had been with Jesus.

John Calvin Reformed @genevareformer

13. Here may we see an evil conscience; for being destitute of right and reason, they break out into open tyranny, the hatred whereof they had essayed to escape. Therefore, he doth first declare that they were convict, that it may appear that they did war against God wittingly and willingly like giants.

Matthew Henry Presbyterian @wholebiblehenry

We have here the trial of Peter and John before the judges of the ecclesiastical court, for preaching a sermon concerning Jesus Christ, and working a miracle in his name. This is charged upon them as a crime, which was the best service they could do to God or men. I. Here is the court set. An extraordinary court, it should seem, was called on purpose upon this occasion.

Commenting on Acts 4:5-14

John Gill Reformed Baptist @doctorgill

Now when they saw the boldness of Peter and John,.... With what courage and intrepidity they stood before them, the presence of mind they had, and the freedom of speech they used, as the word properly signifies: they observed their elocution, the justness of their diction, the propriety of their language, and the strength and nervousness of their reasoning; as well as their great resolution...