But Peter continued knocking: and when they had opened [the door], and saw him, they were astonished.
Berean Study Bible (BSB) - Acts 12:16 >But Peter kept on knocking, and when they opened the door and saw him, they were astounded.
Textus Receptus (TR) - Acts 12:16 >Ὁ δὲ Πέτρος ἐπέμενε κρούων· ἀνοίξαντες δὲ εἶδον αὐτόν, καὶ ἐξέστησαν.