The soldiers, who were bound with Peter in the same chains, could not but miss him as soon as they did awake, and with admiration find the chains still holding them, thought loosened from Peter. What strange imaginations they might have, is not to be expressed, though some guess at it.
Related Commentaries of Acts 12:18
Acts 12:18
18 Now as soon as it was day, there was no small stir among the soldiers, what was become of Peter.