NASB 1995
Now as they observed the confidence of Peter and John and understood that they were uneducated and untrained men, they were amazed, and began to recognize them as having been with Jesus.

American Standard Version
Now when they beheld the boldness of Peter and John, and had perceived that they were unlearned and ignorant men, they marvelled; and they took knowledge of them, that they had been with Jesus.

Berean Study Bible
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.

Douay-Rheims Bible
Now seeing the constancy of Peter and of John, understanding that they were illiterate and ignorant men, they wondered; and they knew them that they had been with Jesus.

English Revised Version
Now when they beheld the boldness of Peter and John, and had perceived that they were unlearned and ignorant men, they marveled; and they took knowledge of them, that they had been with Jesus.

King James Bible
Now when they saw the boldness of Peter and John, and perceived that they were unlearned and ignorant men, they marvelled; and they took knowledge of them, that they had been with Jesus.

World English Bible
Now when they saw the boldness of Peter and John, and had perceived that they were unlearned and ignorant men, they marveled. They recognized that they had been with Jesus.

Young's Literal Translation
And beholding the openness of Peter and John, and having perceived that they are men unlettered and plebeian, they were wondering -- they were taking knowledge also of them that with Jesus they had been --

Acts 4:13 Additional Translations ...