NET
13 When they saw the boldness of Peter and John, and discovered that they were uneducated and ordinary men, they were amazed and recognized these men had been with Jesus.
Darby
13 But seeing the boldness of Peter and John, and perceiving that they were unlettered and uninstructed men, they wondered; and they recognised them that they were with Jesus.
KJV
13 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.