Acts 12:10
And when they passed the first two guards, they came to the iron gate leading out into the city, which opened by itself. So, they went out and, as they walked down the street, the angel [suddenly] left him.
Acts 5:19
But an angel from the Lord one night [miraculously] opened the jail doors and released them, saying,
Acts 16:26
Suddenly there was a terrible earthquake which violently shook the foundation of the jail. Immediately all the [cell] doors swung open and everyone's chains fell off.
John 20:19
So, when it was evening on that day, [which was] the first day of the week [i.e., Sunday] and the doors [of someone's house], where the disciples were gathered, were closed [i.e., probably locked] for fear of the Jewish authorities, Jesus came and stood among them. [Note: Probably Jesus passed through the closed door miraculously]. He said to them, "May there be peace in your hearts."
John 20:26
Eight days later [i.e., the following Sunday], Jesus' disciples were inside [the house] again, [but this time] Thomas was with them. The doors were [still] closed when Jesus [suddenly] stood among them [See note on verse 19] and said, "May there be peace in your hearts."
Acts 12:4
So, Peter was arrested and put in jail with four groups of four soldiers each guarding him. Herod planned to have him brought before the people after the Passover Festival was over.
Revelation 3:7
"And write [this] to the angel of the church at Philadelphia: These are the words of Him who is holy and true, [and] who possesses the key [i.e., the power and authority] of King David, [and] who opens [a door] which no one will close, and who closes one that no one will open: