Acts 12:9

12:9 Peter went out and followed him; he did not realize that what was happening through the angel was real, but thought he was seeing a vision.

Acts 12:14-16

12:14 When she recognized Peter’s voice, she was so overjoyed she did not open the gate, but ran back in and told them that Peter was standing at the gate. 12:15 But they said to her, “You’ve lost your mind!” But she kept insisting that it was Peter, and they kept saying, “It is his angel!” 12:16 Now Peter continued knocking, and when they opened the door and saw him, they were greatly astonished.