Everyone who had known Saul and now saw him prophesying with the prophets said to each other, “What's going on with the son of Kish? Is Saul one of the prophets too?”
When they saw Peter and John's confidence, and realized they were uneducated, ordinary men, they were very surprised. They also recognized them as Jesus' companions.
All who heard him were amazed, and asked, “Isn't this the man who caused so much trouble in Jerusalem for those who believed in Jesus? Wasn't he coming here to have the believers arrested and taken in chains to the chief priests?”
Then Saul also took off his clothes and he too prophesied in Samuel's presence. Then he fell down and lay there naked all that day and all that night. That's why it is said, “Is Saul one of the prophets too?”