Acts 12:9

NIV: Peter followed him out of the prison, but he had no idea that what the angel was doing was really happening; he thought he was seeing a vision.

NAS: And he went out and continued to follow, and he did not know that what was being done by the angel was real, but thought he was seeing a vision.

KJV: And he went out, and followed him; and wist not that it was true which was done by the angel; but thought he saw a vision.

GWT: Peter followed the angel out of the cell. He didn't realize that what the angel was doing was actually happening. He thought he was seeing a vision.

ASV: And he went out, and followed; and he knew not that it was true which was done by the angel, but thought he saw a vision.

BBE: And he went out after him; and he was not certain if what was done by the angel was a fact, for it seemed to him that he was seeing a vision.

DBY: And going forth he followed him and did not know that what was happening by means of the angel was real, but supposed he saw a vision.

DRB: And going out, he followed him, and he knew not that it was true which was done by the angel: but thought he saw a vision.

WBS: And he went out, and followed him, and knew not that it was true which was done by the angel; but thought he saw a vision.

WEB: And he went out and followed him. He didn't know that what was being done by the angel was real, but thought he saw a vision.

YLT: and having gone forth, he was following him, and he knew not that it is true that which is done through the messenger, and was thinking he saw a vision,