Acts 12:12 (KJV)

When they were past the first and the second ward, they came unto the iron gate that leadeth unto the city; which opened to them of his own accord: and they went out, and passed on through one street; and forthwith the angel departed from him.

And when Peter was come to himself, he said, Now I know of a surety, that the Lord hath sent his angel, and hath delivered me out of the hand of Herod, and from all the expectation of the people of the Jews.

And when he had considered the thing, he came to the house of Mary the mother of John, whose surname was Mark; where many were gathered together praying.

And as Peter knocked at the door of the gate, a damsel came to hearken, named Rhoda.

And when she knew Peter’s voice, she opened not the gate for gladness, but ran in, and told how Peter stood before the gate.