Now when they saw the boldness of Peter and John, and perceived that they were unlearned and ordinary men, they marveled; and they took knowledge of them, that they had been with Jesus.
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Interlinear Gloss
AD 1480
seeing the constancy of Peter and John:
For not only their words; their very bearing showed it; that they should stand there so intrepidly to be tried in a cause like this, and with uttermost peril impending over them! Not only by their words, but by their gesture also, and their look and voice, and, in short, by everything about them, they manifested the boldness with which they confronted the people.
having verified that they were men without letters or learning:
The two unlearned men beat down with their rhetoric them and the chief priests. For it was not they that spoke, but the grace of the Spirit.
And they recognized that they had been with Jesus:
he means, in His Passion: for only these were with Him at that time, and then indeed they had seen them humble, dejected: and this it was that most surprised them: the greatness of the change.